🔥 NADCAP
NADCAP Accredited Special Process Suppliers in New Bedford, MA
NADCAP exists for the moment a finished part looks perfect but a special process inside it went wrong. Heat treatment, plating, welding, and nondestructive testing can't be fully verified by measuring the part, so the aerospace and defense industry audits the processes themselves through NADCAP. For buyers sourcing in New Bedford, understanding how special-process accreditation flows through a supply chain is the difference between a compliant program and a costly escape.
NADCAPAS9100ISO 9001
What NADCAP Accredits and Why It's Process-Specific
NADCAP, run by the Performance Review Institute on behalf of the aerospace primes, accredits special processes rather than companies as a whole. A special process is one whose conformance can't be confirmed by inspecting or measuring the finished part. Heat treating changes a metal's internal grain structure and hardness; you can't see it on the surface. Plating and anodizing build microns-thick coatings whose adhesion and thickness depend on bath chemistry and control. Welding integrity lives inside the joint. Nondestructive testing, ironically, is itself a special process because a bad inspection can pass a cracked part.
Because these processes are invisible to final inspection, the aerospace industry decided to audit the process control directly, on a per-process basis, against published Audit Criteria checklists. A supplier earns NADCAP accreditation for heat treating, or for chemical processing, or for NDT methods like penetrant and radiographic testing, each separately. There is no blanket NADCAP accreditation; the scope is always process-specific.
For a New Bedford buyer this means you must match each special process on your drawing to a supplier accredited for that exact process. A machine shop with NADCAP for welding tells you nothing about whether its heat treat is accredited. Reading the scope precisely is the whole game.
How Special Processing Flows Through a New Bedford Supply Chain
Most New Bedford machine shops don't perform special processes in-house. The typical pattern is that a machining or fabrication shop, often AS9100 certified, sends heat treat, plating, and NDT to specialized NADCAP-accredited processors elsewhere in the region or in the broader New England aerospace supply base. This is normal and acceptable, as long as every special process on the print routes to an accredited source.
The risk lives in the flow-down. When a prime requires a NADCAP-accredited process, the requirement must pass cleanly from the buyer through the machine shop to the special processor. Breakdowns happen when a shop substitutes a non-accredited processor to save cost or time, or when the processor's accreditation has a scope gap, for instance accredited for one heat-treat alloy class but not the one your part uses. These gaps don't show up on the finished part, which is exactly why NADCAP exists.
For buyers, the practical move is to require the machine shop to name its special-process subcontractors and their NADCAP scopes up front, and to require process certifications with every shipment. The proximity of New Bedford to the southeastern Massachusetts and wider New England aerospace cluster means accredited processors are reachable, but you still have to verify each one rather than assume the machine shop has it covered.
Verifying Accreditation Scope and the Records You Need
NADCAP accreditations are tracked through the Performance Review Institute's eAuditNet system. The authoritative verification is to confirm the processor's accreditation and, critically, its exact scope in eAuditNet, not just to accept a certificate. A processor might hold NADCAP for heat treating but only for specific furnace types, atmospheres, or material classes, and your part has to fall inside that scope.
With every NADCAP-processed lot you should receive process certifications documenting the actual parameters used: for heat treat, the furnace load, cycle, temperatures, and any required hardness or microstructure results; for plating, the bath, thickness, and adhesion data; for NDT, the method, technique, and qualified inspector's results. These certifications are the traceable evidence that the invisible process was performed and controlled correctly. They also feed your first-article and quality records back up to the prime.
The red flags are specific to special processing: a process certification that omits actual parameters, an accreditation scope that doesn't cover your alloy or method, an expired or suspended status in eAuditNet, or a machine shop that can't tell you which processor did the work. Because a special-process escape can ground hardware, the verification rigor here is higher than for general quality certs, and it's worth the time on every program.
Frequently Asked Questions
NADCAP is deliberately process-specific because the entire point of the program is to audit individual special processes, not companies. A special process is one whose conformance can't be verified by inspecting the finished part: heat treating, plating and anodizing, welding, nondestructive testing, chemical processing, and similar operations. Each is governed by its own published Audit Criteria, and the Performance Review Institute accredits a supplier separately for each process it performs. A supplier can hold NADCAP for heat treating but not for plating, or for penetrant inspection but not radiographic inspection. There is no umbrella NADCAP accreditation that covers everything a company does. For a New Bedford buyer, this means you must read the accreditation scope precisely and match every special process on your engineering drawing to a supplier accredited for that exact process and, often, that exact material class or method. Assuming a shop with one NADCAP accreditation can handle a different special process is one of the most common and dangerous sourcing mistakes in aerospace and defense work.
Usually not. The common and entirely acceptable pattern is that a New Bedford machining or fabrication shop, frequently AS9100 certified, performs cutting, milling, turning, and assembly in-house and sends special processes like heat treating, plating, and nondestructive testing to specialized NADCAP-accredited processors elsewhere in the southeastern Massachusetts and broader New England aerospace supply base. What matters to you as a buyer is not whether the prime shop holds the NADCAP accreditation itself, but whether every special process required by your drawing routes to a genuinely accredited source. The risk is in the flow-down: a shop might substitute a cheaper non-accredited processor, or use a processor whose accreditation scope doesn't cover your specific alloy or method. To manage this, require the machine shop to name its special-process subcontractors and their NADCAP scopes before you award, and require process certifications with every shipment. New Bedford's proximity to the New England aerospace cluster means accredited processors are accessible, but you must still verify each one individually.
NADCAP accreditations are managed through eAuditNet, the Performance Review Institute's system. The authoritative check is to verify the processor's accreditation and its exact scope in eAuditNet rather than accepting a certificate at face value. Scope is the crucial detail: a processor accredited for heat treating may be limited to specific furnace types, atmospheres, temperature ranges, or material classes, and your part must fall entirely within that scope. The same applies to plating chemistries and NDT methods. Confirm the accreditation status is current, not expired or suspended. Then, with every processed lot, require process certifications documenting the actual parameters used, the furnace cycle and resulting hardness for heat treat, the bath, thickness, and adhesion for plating, or the method, technique, and qualified inspector results for NDT. These records are the traceable proof that the invisible process was controlled correctly, and they feed your first-article and quality documentation up to the prime. A certification missing actual parameters, or a scope that doesn't cover your material or method, is a stop until resolved.
These certifications layer rather than substitute. ISO 9001 is the general quality management baseline. AS9100 adds aerospace-specific quality requirements on top of ISO 9001 and governs the overall quality system of a machining, fabrication, or assembly shop. NADCAP sits alongside both and accredits specific special processes that the quality system alone can't validate, because the conformance of heat treat, plating, welding, or NDT can't be confirmed by inspecting the finished part. A typical defense or aerospace part flows through an AS9100 machine shop for the machining and assembly, then to NADCAP-accredited processors for each required special process, all under ITAR controls if the data is defense-controlled. For a New Bedford buyer, the correct approach is to confirm the machine shop's AS9100 quality system, then separately confirm NADCAP coverage for every special process on the drawing, whether performed in-house or flowed to a subcontractor. A shop with strong AS9100 but a gap in NADCAP coverage for a required process is not fully qualified for that part.
Last updated: July 2026
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