# Tight Tolerance Aerospace CNC Machining: Verify a Supplier

> Precision Advanced Manufacturing breaks down how to verify a supplier's tight tolerance aerospace CNC machining capability before awarding a PO.

**Published:** 2026-10-03 | **Updated:** 2026-10-22 | **Author:** precision
**URL:** https://precisionam.com/articles/aerospace/tight-tolerance-aerospace-cnc-machining/
**Type:** post

**Categories:** Aerospace

![Tight Tolerance Aerospace CNC Machining: Verify a Supplier](https://blog.precisionam.com/wp-content/uploads/sites/56/2026/10/1790333942413-4c81bfb90a85-1024x572.webp)

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## Content

*Last updated: October 21, 2026*

## Key Takeaways

- Tight tolerance aerospace CNC machining requires documented evidence of capability, including quality certifications, FAI packages and traceability records.
- Aerospace tolerance requirements vary by feature function, material and part size, so buyers request capability evidence tied to the specific drawing.
- Verification before awarding a PO includes checking AS9100D certification scope, AS9102 FAI documentation, CMM reports, material traceability and proven capability on comparable features.
- AS9100D certification is a pass/fail sourcing criterion that adds risk management, configuration control, first-article inspection, counterfeit-parts prevention and FOD control beyond ISO 9001.
- Precision Advanced Manufacturing maintains AS9100D, ISO 9001:2015 and ITAR-registered quality systems with multi-axis machining and integrated finishing across its Anaheim, California and Texas locations.

[Request A Documented Tight Tolerance Capability Review](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining)

## Aerospace CNC Machining Tolerances By Feature Tier

Aerospace tolerance requirements follow component function and assembly role. Required values change with the feature, the material and the part’s relationship to the next assembly. Identical CNC operations on a support bracket, hydraulic manifold or turbine component can carry different tolerances because each feature supports a different risk level.

![A commercial airliner in flight against a blue sky.](https://cdn.aigrowthmarketer.co/1785164215115-cf050b902241.webp)**Aerospace manufacturing for flight-critical hardware — machined and fabricated to AS9100D with the traceability and repeatability commercial airframe programs depend on.**

The tier a feature belongs to sets the proving process the shop must present to the buyer. Conventional features may only need standard inspection records. Tight features require full AS9102 FAI and dense CMM data. Sub-tight or flight-critical features add process capability studies and detailed tool-control plans. A shop that cannot produce the evidence package for the tier on the drawing has not demonstrated capability for that feature.

![An array of small precision-machined metal components.](https://cdn.aigrowthmarketer.co/1785164158710-5382f6e5c16d.webp)**From a single bracket to a full build package, precision-machined components are inspected to print and delivered with the documentation mission-critical programs require.**

## What Is Considered A Tight Tolerance?

[Aerospace commonly cites ±0.001 in (25 µm) as the threshold for flight-critical or tight-tolerance features](https://zhenlingmetal.com/blog/aerospace-cnc-machining-guide). Requirements still vary by feature and function, so the drawing always governs.

[Certain flight-critical features, such as bearing bores and fuel or hydraulic system components, are often specified between about ±0.0001 and ±0.0005 in](https://zhenlingmetal.com/blog/aerospace-cnc-machining-guide). The tightest work, including bearing bores, sealing faces and precision shafts, typically moves to grinding or EDM instead of standard milling. See the [Tight Tolerance CNC Machining For Aerospace Parts](https://precisionam.com/articles/tight-tolerance-cnc-aerospace/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining) overview for context across part families.

## Tolerance Depends On Feature, Material And Size

[No universal aerospace CNC tolerance applies across every feature](https://daxincnc.com/resources/aerospace-cnc-machining-materials-processes-quality-requirements). A shop that holds ±0.0002 in on turned parts may not hold that limit on long milled pockets or difficult alloys. Three common aerospace materials illustrate how behavior in the cut changes achievable tolerance.

**Ti-6Al-4V:** [Titanium has a thermal conductivity of roughly 6.7 W/mK, about 3% that of aluminum, so heat concentrates at the cutting edge](https://le-creator.com/blog/aerospace-machining). As tools wear, hole and slot sizes drift during the run. Because tool wear drives that drift, a capable shop explains how it manages tool life on critical features and how often it inspects key dimensions during a run.

**Inconel 718:** [Elevated-temperature strength and low thermal conductivity create high cutting force, high temperature and multiple tool-wear mechanisms](https://daxincnc.com/resources/aerospace-cnc-machining-materials-processes-quality-requirements). [Dwelling or rubbing on Inconel surfaces work-hardens the layer and increases later tool load](https://gd-prototyping.com/axis-complex-part-machining). A capable process separates roughing and finishing into distinct operations with controlled tool paths and feeds.

**7075-T6 And Thin-Wall Aluminum:** [Heavy material removal redistributes residual stresses, so a part can measure in tolerance while clamped and then move after release](https://daxincnc.com/resources/aerospace-cnc-machining-materials-processes-quality-requirements). A capable shop explains how inspection represents the part in its drawing condition instead of only its fixtured condition.

Effective sourcing focuses on capability evidence for the specific feature, material and size class on the drawing. The [Aerospace Tight Tolerance CNC Machining Explained](https://precisionam.com/articles/aerospace-tight-tolerance-cnc-machining/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining) article covers how these variables interact across common aerospace part families.

## GD&T Callouts That Drive Aerospace Inspection

[ASME Y14.5-2018 (R2024) is the current U.S. GD&T standard](https://wevolver.com/article/gdt-explained-symbols-datums-and-tolerances). Three callouts appear frequently on tight tolerance aerospace drawings and shape the required CMM evidence.

**True Position:** [A hole can meet its diameter limit and still fail assembly if its axis drifts off the basic location](https://rivcut.com/resources/true-position-calculator). The tolerance zone is cylindrical and referenced to the datum frame, and MMC modifiers can grant bonus tolerance as the feature departs from worst-case material size. A CMM report for a true-position callout should show nominal location, measured feature center, calculated positional deviation and the datum reference frame.

![A CMM touch probe measuring a machined aluminum bracket.](https://cdn.aigrowthmarketer.co/1785164194032-a09872ce26c4.webp)**Every critical dimension is verified — CMM inspection and controlled quality workflows produce first-article and in-process data you can trace to each part.**

**Cylindricity:** [Cylindricity controls the entire cylindrical surface, including circularity, straightness of axis and taper, without requiring a datum reference](https://trueprecisionmachining.com/engineering/gdt-symbols). [It is sensitive to tool deflection, clamping distortion and thermal drift](https://trueprecisionmachining.com/engineering/gdt-symbols), so it demands dense CMM sampling across multiple axial sections. Sparse point patterns miss lobing, taper and barrel errors.

**Coaxiality On Mating Features:** [ASME Y14.5-2018 withdrew concentricity because verifying derived median points required extensive data collection that rarely matched the functional requirement](https://wevolver.com/article/gdt-explained-symbols-datums-and-tolerances). Current drawings control coaxiality with position or profile of a surface. A buyer reviewing a legacy drawing confirms which control governs before the shop programs its inspection routine.

The drawing’s datum scheme should match how the part mounts in assembly. A capable shop can walk through its datum alignment logic before award, because a mismatch between the drawing’s datum structure and the inspection setup often produces parts that pass CMM and fail assembly.

## How To Verify ±0.0001 In Capability Before Awarding A PO

This checklist frames each verification item as a question and the document that answers it. Teams can paste it into an RFQ or pre-award audit. For guidance on structuring the quote request itself, see [How To Get A Tight Tolerance Machining Quote](https://precisionam.com/articles/tight-tolerance-machining-quote/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining).

- **AS9102 First-Article Inspection:** Ask whether the shop will provide a complete FAI package with all three forms on the first production part. The answer is the AS9102 FAI report, AS9102C, the current revision published June 2023, with a ballooned drawing linking every characteristic to measured evidence. [A supplier that produces only Form 3 without Forms 1 and 2 commits an automatic AS9102 rejection at the customer site](https://cnc.bozemetal.com/blog/how-to-qualify-as9100-titanium-supplier).
- **CMM And GD&T Reporting:** Ask which features receive CMM inspection and which datum alignment and fitting method apply. The answer is CMM reports showing nominal, measured values, positional deviation and equipment serial number. [CMM rooms are typically held at 20 ± 1°C to keep thermal expansion below 1 µm on critical features](https://cnc.bozemetal.com/blog/how-to-qualify-as9100-titanium-supplier).
- **Material Certifications And Traceability:** Ask whether the shop can trace one shipped part back to its mill heat lot. The answer is mill test reports, lot records and a certificate of conformance referencing the drawing revision. [Aerospace material traceability requires an unbroken documentation chain from raw stock through every manufacturing operation to the finished-part certificate of conformance](https://goscpm.com/post/aerospace-precision-machining-as9100-itar-demands).
- **Calibration Records:** Ask about the CMM’s calibration status and measurement uncertainty. The answer is current calibration certificates traceable to a national metrology institute. [AS9100D requires all inspection equipment to be calibrated and traceable to national standards, with calibration records available for audit or customer review](https://daxincnc.com/resources/aerospace-cnc-machining-materials-processes-quality-requirements).
- **AS9100D Scope:** Ask whether the certificate scope explicitly covers aerospace machining at the site that will run the part. The answer is the certificate and its verification in the [IAQG OASIS database](https://iaqg.org/oasis). [AS9100D certificates issued to a parent company headquarters do not apply to a remote manufacturing site](https://rapidcision.com/as9100d-aerospace-cnc-machining).
- **ITAR Registration:** Ask whether the shop is registered for defense-related work and how it handles controlled technical data. The answer is registration evidence and a written Technology Control Plan. [ITAR registration is a legal obligation under the Directorate of Defense Trade Controls, not a quality certification](https://goscpm.com/post/aerospace-precision-machining-as9100-itar-demands).
- **Proven Capability On Comparable Features:** Ask for a part with the same feature, material and size class. The answer is a representative FAI or capability study that matches the drawing, not only the smallest tolerance on the website. [A prototype may pass because a skilled machinist adjusted the process; production fails if those adjustments are not controlled](https://uneedpm.com/aerospace-cnc-machining-services-as9100-certified-aero-components).

[Send A Drawing For Checklist-Based Supplier Evaluation](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining)

## AS9100D CNC Machining As A Quality-System Filter

AS9100D CNC machining functions as a pass/fail sourcing criterion. [AS9100D, published by the International Aerospace Quality Group, builds on ISO 9001:2015 with added requirements for risk management, configuration management, first-article inspection, counterfeit-parts prevention, FOD control and full traceability](https://le-creator.com/blog/aerospace-machining). [ISO 9001 alone lacks FAI, configuration control, counterfeit-parts requirements and FOD programs for flight-critical aerospace parts](https://rapidcision.com/as9100d-aerospace-cnc-machining). Contract language that calls out AS9100 requires that specific standard.

ITAR registration forms a separate legal export-control obligation under the U.S. State Department’s Directorate of Defense Trade Controls. It functions as a contract prerequisite for most U.S. military aerospace programs. Traceability completes the quality-system filter through an unbroken chain from mill heat lot to shipped part, with every link present, legible and archived. [A recurring AS9100 documentation failure occurs when FAI, traceability, counterfeit parts and FOD records exist independently but are not cross-referenced, so an auditor cannot link an FAI to its traceability record](https://thestandardsnavigator.com/tag/as9100-audit).

For a deeper look at how these certifications support supplier qualification, see [CNC Machining Aerospace Components: Qualify A U.S. Partner](https://precisionam.com/articles/precision-cnc-machining-aerospace-components/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining).

### Tight Tolerance Machining Compared With Standard Machining

Standard machining suits non-critical brackets and housings with conventional inspection. Tight tolerance work adds controlled setup, temperature-stable inspection, denser GD&T verification and full FAI documentation. The feature tier on the drawing should drive the supplier evidence package and the required quality infrastructure. A shop that quotes tight tolerance work without matching quality systems presents a number it cannot prove.

## AS9100 Precision Machining Capabilities At Precision Advanced Manufacturing

Precision Advanced Manufacturing structures its tight tolerance CNC machining services to answer each item on the verification checklist with documented evidence.

![A precision machine shop floor with CNC equipment and work cells.](https://cdn.aigrowthmarketer.co/1785163904437-77d81f3f11f5.webp)**Advanced manufacturing: a climate-stable shop floor where multi-axis CNC, turning, and fabrication cells work prototype-to-full-rate volumes.**

Its quality system includes AS9100D and ISO 9001:2015 registrations and ITAR registration. Every project runs under defined quality checkpoints, traceability and full documentation aligned with aerospace standards, so the core pass/fail criteria in the checklist are addressed.

Operations run across two U.S. locations, Anaheim, California and Texas, and both support aerospace and defense programs. ITAR-controlled technical data is handled under documented operational controls that align with defense program expectations.

Multi-axis milling and turning, including Swiss-type machining, support complex, high-tolerance components across aerospace, space, satellite and UAV programs. The team works in titanium and Inconel, the materials where tool-wear management, roughing and finishing separation and in-process inspection carry the most weight. This experience supports the proven capability on comparable features checklist item.

![A five-axis CNC head machining a round metal workpiece.](https://cdn.aigrowthmarketer.co/1785163943949-293d9b0cce58.webp)**Five-axis machining reaches complex geometries in a single setup — fewer fixtures, tighter true position, and the repeatability aerospace and defense programs demand.**

Precision welding with thermal distortion control maintains structural integrity on lightweight aerospace assemblies. Integrated secondary finishing, including anodizing, passivation, plating and related treatments, aligns to aerospace standards and delivers finished, ready-to-integrate components that reduce internal handling.

In-house engineering, CNC programming and tooling development engage at the outset to strengthen manufacturability and production efficiency. The production platform scales from prototype through multi-shift, full-rate manufacturing while maintaining the same validated quality, which supports traceability and lot-consistency requirements. See the [Tight Tolerance CNC Machining For Aerospace And Defense](https://precisionam.com/articles/tight-tolerance-cnc-machining-services/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining) article for additional capability detail.

## Conclusion: Verify First, Then Award

Effective sourcing for tight tolerance aerospace machining starts with evidence. That evidence lives in the quality system, the FAI package, the traceability chain and proven capability on comparable features.

Because Precision Advanced Manufacturing holds AS9100D, ISO 9001:2015 and ITAR registrations at its Anaheim, California and Texas locations, the certificate scope matches the sites that run aerospace work. That same quality system carries programs from prototype through full-rate production while keeping traceability and inspection documentation intact. Multi-axis machining, integrated finishing and experience in demanding alloys support the tolerance levels described in this article.

Teams that engage Precision Advanced Manufacturing for a quote-based project evaluation can align drawings, tolerance tiers and documentation expectations before award.

[Start A Tight Tolerance Supplier Qualification Review](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining)

## Frequently Asked Questions

### What Counts As A Tight Tolerance In Aerospace?

The body of this article covers commonly cited tight tolerance thresholds and example ranges for flight-critical features. The key point is that no single number applies across every feature, so the drawing and its function define what counts as tight for each part.

### Why Might A Shop’s Advertised Tolerance Not Apply To Every Feature Or Material?

Achievable tolerance depends on feature geometry, material machinability, part size, datum structure and inspection capability. [A shop that holds ±0.0002 in on a turned aluminum diameter may not hold that same limit on a milled pocket in Inconel, a long thin-wall rib in titanium or a deep bore with limited tool access](https://uneedpm.com/aerospace-cnc-machining-services-as9100-certified-aero-components). Thermal effects, tool wear, residual stress after unclamping and clamping distortion all shift what a process can deliver on a specific feature. Buyers benefit from capability evidence tied to the specific feature, material and size class on the drawing.

### What Documents Should Be Requested In An Aerospace RFQ?

- The current AS9100D certificate with scope statement, verifiable through the IAQG OASIS database
- A sample AS9102 FAI package with all three forms and a ballooned drawing
- CMM reports showing nominal, measured and positional deviation data with equipment serial numbers
- Mill test reports and lot records demonstrating material traceability to the heat number
- Current calibration certificates for inspection equipment, traceable to a national metrology institute
- ITAR registration evidence and a written Technology Control Plan
- A representative FAI or capability study on a part with the same feature, material and size class as the sourced part

Missing any one of these documents signals that further qualification work should occur before award.

### What Does AS9102 First-Article Inspection Prove?

[AS9102 FAI proves that the first production part, made on the production machine with production tooling, fixtures and NC program, conforms to every characteristic on the engineering drawing](https://cnc.bozemetal.com/blog/how-to-qualify-as9100-titanium-supplier). The package comprises three forms. [Form 1 captures part number accountability, Form 2 captures raw material and special process accountability including heat or lot numbers, and Form 3 records every drawing characteristic with the measured value, inspection method, inspector signature and design intent](https://cnc.bozemetal.com/blog/how-to-qualify-as9100-titanium-supplier). A valid FAI functions as a linked evidence package that connects the part to its material, its process and its inspection data. [AS9102 FAI is also required again after any tooling change, engineering change order or process change](https://cnc.bozemetal.com/blog/how-to-qualify-as9100-titanium-supplier).

### How Are GD&T Callouts Verified On A CMM?

CMM verification begins by establishing the datum reference frame through measuring datum features in the order stated in the feature control frame and fitting the coordinate system to them. The toleranced feature is then measured with enough points to characterize its geometry instead of only sampling it. For true position, [the CMM calculates positional deviation using the formula 2 × √(ΔX² + ΔY²)](https://rivcut.com/resources/true-position-calculator) and compares the result with the stated tolerance, including any MMC bonus. For cylindricity, the CMM collects data around the circumference and across multiple axial sections to capture lobing, taper and barrel errors. The CMM report should document the datum alignment logic, fitting method, environmental conditions and equipment calibration status. The fitting algorithm matters because [minimum-zone and least-squares methods can produce different pass or fail outcomes on the same measured points](https://wevolver.com/article/gdt-explained-symbols-datums-and-tolerances).

### How Does A Shop Scale From Prototype To Full-Rate Production Without Losing Tolerance Control?

A manufacturing process that produces a small number of prototypes still needs additional control for production. Production shifts focus to repeatable workholding, stable tooling, tool-life management, inspection efficiency, traceability, lot consistency and controlled revisions. Buyers gain confidence by asking how the shop documents the prototype process, including NC program revision, fixture design, tooling and inspection plan, and how it controls changes as volume increases. A shop with AS9100D configuration management controls can show which design revision, engineering change and customer-approved deviation applied to a part at the time of manufacture.

### How Do Buyers Transition An Existing Part To A New Supplier Mid-Program?

[When the supplier for a drawing-specified process changes, the new supplier performs a partial FAI covering the processes and characteristics moved](https://endevco.com/contentstore/mktgcontent/endevco/uploads/2019/02/AS9102-frequently-asked-questions1.pdf), because the change can affect fit, form or function. The new supplier demonstrates material traceability from its own approved sources, produces CMM reports on the same features the previous supplier inspected and confirms that its AS9100D scope covers the part’s processes and location. Pilot builds or validation runs reduce transition risk by confirming the new supplier’s process before full-rate production. Buyers also benefit from reviewing the new supplier’s corrective action records from the prior 12 months to assess quality-system maturity.

[Discuss A Mid-Program Supplier Transition](https://precisionam.com/request-a-quote/?utm_source=ai-growht-agent&utm_term=tight-tolerance-aerospace-cnc-machining)

## Read Next

- [Tight Tolerance CNC Machining: How to Qualify a Supplier](https://precisionam.com/articles/tight-tolerance-cnc-aerospace-defense/)
- [Aerospace CNC Tolerances: What Buyers Need to Know](https://precisionam.com/articles/tight-tolerance-cnc-aerospace/)
- [Aerospace Tight Tolerance CNC: Achievable, Cost & Proof](https://precisionam.com/articles/aerospace-tight-tolerance-cnc-machining/)
- [CNC Aerospace Parts: Tolerances, Capability & Qualification](https://precisionam.com/articles/tight-tolerance-cnc-aerospace-parts/)
- [Tight Tolerance CNC Machining: A Supplier Buyer’s Guide](https://precisionam.com/articles/tight-tolerance-cnc-machining-services/)

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    - **Name:** What Counts As A Tight Tolerance In Aerospace?
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      - **Text:** The body of this article covers commonly cited tight tolerance thresholds and example ranges for flight-critical features. The key point is that no single number applies across every feature, so the drawing and its function define what counts as tight for each part.
    **Question:**

    - **Name:** Why Might A Shops Advertised Tolerance Not Apply To Every Feature Or Material?
      **Answer:**

      - **Text:** Achievable tolerance depends on feature geometry, material machinability, part size, datum structure and inspection capability. A shop that holds ±0.0002 in on a turned aluminum diameter may not hold that same limit on a milled pocket in Inconel, a long thin-wall rib in titanium or a deep bore with limited tool access. Thermal effects, tool wear, residual stress after unclamping and clamping distortion all shift what a process can deliver on a specific feature. Buyers benefit from capability evidence tied to the specific feature, material and size class on the drawing.
    **Question:**

    - **Name:** What Documents Should Be Requested In An Aerospace RFQ?
      **Answer:**

      - **Text:** The current AS9100D certificate with scope statement, verifiable through the IAQG OASIS database. A sample AS9102 FAI package with all three forms and a ballooned drawing. CMM reports showing nominal, measured and positional deviation data with equipment serial numbers. Mill test reports and lot records demonstrating material traceability to the heat number. Current calibration certificates for inspection equipment, traceable to a national metrology institute. ITAR registration evidence and a written Technology Control Plan. A representative FAI or capability study on a part with the same feature, material and size class as the sourced part. Missing any one of these documents signals that further qualification work should occur before award.
    **Question:**

    - **Name:** What Does AS9102 First-Article Inspection Prove?
      **Answer:**

      - **Text:** AS9102 FAI proves that the first production part, made on the production machine with production tooling, fixtures and NC program, conforms to every characteristic on the engineering drawing. The package comprises three forms. Form 1 captures part number accountability, Form 2 captures raw material and special process accountability including heat or lot numbers, and Form 3 records every drawing characteristic with the measured value, inspection method, inspector signature and design intent. A valid FAI functions as a linked evidence package that connects the part to its material, its process and its inspection data. AS9102 FAI is also required again after any tooling change, engineering change order or process change.
    **Question:**

    - **Name:** How Are GD&T Callouts Verified On A CMM?
      **Answer:**

      - **Text:** CMM verification begins by establishing the datum reference frame through measuring datum features in the order stated in the feature control frame and fitting the coordinate system to them. The toleranced feature is then measured with enough points to characterize its geometry instead of only sampling it. For true position, the CMM calculates positional deviation using the formula 2 × √(ΔX² + ΔY²) and compares the result with the stated tolerance, including any MMC bonus. For cylindricity, the CMM collects data around the circumference and across multiple axial sections to capture lobing, taper and barrel errors. The CMM report should document the datum alignment logic, fitting method, environmental conditions and equipment calibration status. The fitting algorithm matters because minimum-zone and least-squares methods can produce different pass or fail outcomes on the same measured points.
    **Question:**

    - **Name:** How Does A Shop Scale From Prototype To Full-Rate Production Without Losing Tolerance Control?
      **Answer:**

      - **Text:** A manufacturing process that produces a small number of prototypes still needs additional control for production. Production shifts focus to repeatable workholding, stable tooling, tool-life management, inspection efficiency, traceability, lot consistency and controlled revisions. Buyers gain confidence by asking how the shop documents the prototype process, including NC program revision, fixture design, tooling and inspection plan, and how it controls changes as volume increases. A shop with AS9100D configuration management controls can show which design revision, engineering change and customer-approved deviation applied to a part at the time of manufacture.
    **Question:**

    - **Name:** How Do Buyers Transition An Existing Part To A New Supplier Mid-Program?
      **Answer:**

      - **Text:** When the supplier for a drawing-specified process changes, the new supplier performs a partial FAI covering the processes and characteristics moved, because the change can affect fit, form or function. The new supplier demonstrates material traceability from its own approved sources, produces CMM reports on the same features the previous supplier inspected and confirms that its AS9100D scope covers the part’s processes and location. Pilot builds or validation runs reduce transition risk by confirming the new supplier’s process before full-rate production. Buyers also benefit from reviewing the new supplier’s corrective action records from the prior 12 months to assess quality-system maturity.

  **Article:**

  - **Headline:** Tight Tolerance Aerospace CNC Machining: Verify a Supplier
  - **Description:** Precision Advanced Manufacturing breaks down how to verify a supplier's tight tolerance aerospace CNC machining capability before awarding a PO.
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---

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## Citations

- [Precision CNC Machining for Aerospace: A Buyer’s Guide](https://precisionam.com/articles/aerospace/precision-cnc-machining-aerospace-guide/)
- [Space Qualified CNC Machining: A Buyer’s Qualification Guide](https://precisionam.com/articles/aerospace/space-qualified-cnc-machining-guide/)
- [ITAR CNC Machining for Military Aircraft: A Supplier Guide](https://precisionam.com/articles/aerospace/itar-cnc-machining-military-aircraft/)
- [Titanium CNC Machining for Aerospace: Grades & Compliance](https://precisionam.com/articles/aerospace/titanium-cnc-machining-aerospace/)
- [Aerospace CNC Machining Lead Times: A Phase-By-Phase Guide](https://precisionam.com/articles/aerospace/aerospace-cnc-machining-lead-times/)

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