NADCAP Accredited Special Process Suppliers in Tacoma, WA

They operate at different levels and are complementary, not interchangeable. AS9100 certifies a company's overall aerospace quality management system, covering how the organization runs across all its activities. NADCAP, administered by PRI, accredits specific special processes against detailed industry consensus audit criteria, things like heat treating, plating and other chemical processing, welding, and nondestructive testing. A machining shop typically holds AS9100 for its quality system, while the special-process houses in its supply chain hold NADCAP accreditation for the particular processes they perform. Critically, NADCAP is granted per process and method, so a supplier is accredited for the specific commodities it has been audited for, not for special processes generally. For an aerospace part, you generally need both present in the routing: AS9100 governing the quality systems of the companies involved, and NADCAP accreditation on every special process the part passes through. A prime will expect to see both, and the absence of NADCAP on a required special process can get parts rejected even if every company involved holds AS9100.

NADCAP accreditations are verifiable through eAuditNet, the system of record maintained by PRI, where accredited suppliers appear in the Qualified Manufacturers List with their specific commodities and current accreditation status. Ask the supplier for their NADCAP accreditation details, then confirm in eAuditNet that the accreditation is active and, just as importantly, that it covers the exact process, method, and applicable specification your part requires. This second step is where buyers often go wrong: a chemical processing accreditation may not cover the specific plating type your drawing calls out, and a welding accreditation may not cover your process or material. Accreditation has both an expiration date and a defined scope, so a current accreditation in the wrong commodity does you no good. Beyond eAuditNet, check whether the prime on your program maintains its own approved-source requirements, because some primes require their suppliers to use sources from the prime's approved list even where NADCAP accreditation exists. Verifying both the eAuditNet status and any prime-specific approval before parts ship is what prevents a costly lot rejection at the prime's receiving inspection.

The special processes that show up most in aerospace routings from the Puget Sound machining base include heat treating, which covers hardening, stress relief, and annealing of metallic parts; chemical processing, a broad commodity that includes anodizing, chemical conversion coating (chem film), plating, and passivation for corrosion protection and surface preparation; welding, where the procedure and operator qualifications matter to a specific specification; and nondestructive testing, including penetrant, magnetic particle, radiographic, ultrasonic, and eddy current methods used to find defects without destroying the part. Surface enhancement processes like shot peening and nonconventional machining also fall under NADCAP. A typical machined aerospace part might require heat treat followed by a chem film coating and a penetrant inspection, which means three separate NADCAP commodities, often at three different accredited suppliers. When mapping your part's routing, identify every special process step and confirm a current, scope-appropriate NADCAP accreditation exists for each. The machining shop usually subcontracts these to specialized accredited houses, so your visibility needs to extend through the entire subtier chain, not just the company that machines the part.

Aerospace parts are routing-heavy, often passing through machining and then several special-process houses before final inspection, and every hop between suppliers adds transit time plus a queue at the next shop. A part needing heat treat, plating, and NDT can spend more calendar time moving between and waiting at special-process suppliers than it spends being machined. When those accredited heat treaters, platers, and NDT labs are concentrated in the Puget Sound corridor near the machining shop, the transit hops shrink, the overall routing compresses, and problems get resolved faster because the suppliers are close enough for in-person coordination. That regional density is a genuine advantage of sourcing the full routing through a Tacoma machining shop with established NADCAP-accredited subtier relationships. The tradeoff is that some specialized processes or materials may only be available at distant accredited houses, which lengthens the chain and the schedule. The practical approach is to map the complete routing up front, keep as many special-process hops in-region as the part specification allows, and verify each accreditation before committing to a delivery date, so the lead time you plan reflects the real end-to-end chain rather than just the machining step.

Usually not, and that is normal in aerospace. NADCAP is granted per special process, and the processes a part needs, heat treating, chemical processing, welding, nondestructive testing, are distinct commodities that typically reside at specialized suppliers rather than under one roof. A Tacoma machining shop generally holds AS9100 for its quality system and then subcontracts the special processes to NADCAP-accredited houses that focus on each commodity. Some larger suppliers do bring multiple special processes in-house and hold several NADCAP accreditations, but expecting a single source for every process is unrealistic and can even reduce quality, since the best heat treaters, platers, and NDT labs are often dedicated specialists. What matters to you as a buyer is not whether one company does everything, but whether every special process in your part's routing is covered by a current, scope-appropriate NADCAP accreditation, and whether the prime supplier manages that subtier chain with proper approved-source controls and verification. Ask the machining shop to map the full routing and identify the accredited source for each step, then confirm each accreditation in eAuditNet. A well-run shop manages this network actively because a single lapsed or out-of-scope accreditation can get an entire lot rejected.