AS9100 Rev D Aerospace Suppliers in Oshkosh, WI

Not necessarily in-house, but the special processes on your part almost certainly need NADCAP accreditation somewhere in the chain. AS9100 governs the overall quality management system, while NADCAP accredits specific special processes like heat treatment, welding, chemical processing, and nondestructive testing where you cannot inspect quality into the finished part. A local AS9100 machine shop may legitimately perform all machining itself and route heat treat or anodize to a NADCAP-accredited processor it controls through its approved supplier list. The key is to verify the flow-down: ask which operations are special processes, who performs each one, and whether those sub-tiers hold current NADCAP accreditation for the relevant commodity. Many aerospace primes mandate NADCAP for these processes by contract, so confirm your own program's requirements first. The mistake to avoid is assuming an AS9100 certificate alone covers special processing; it covers the management system, not the metallurgical or chemical process accreditation that primes increasingly require at the operation level.

The authoritative check is the OASIS database, the IAQG's online aerospace supplier information system. Every legitimate AS9100 certification issued by an accredited certification body is registered there, so if a supplier's certificate cannot be located in OASIS, treat the certificate with serious skepticism. Confirm the certificate's scope statement matches the work you intend to award, verify the expiration date, and check that the issuing registrar holds aerospace accreditation. Beyond the certificate, ask whether the supplier has had any major nonconformances in recent audits and request a sample inspection data package from a comparable job. Authenticity is necessary but not sufficient; you also want evidence the system is mature, meaning they routinely produce AS9102 first-article reports, maintain configuration control, and manage their sub-tier special processors. A supplier that can pull these records quickly demonstrates a lived-in system, whereas one that scrambles to assemble basic traceability documentation is a risk regardless of what the certificate says.

The defining difference is the layered documentation and process-control burden aerospace imposes on top of ordinary machining competence. In Oshkosh you benefit from a supply base already conditioned by severe-duty vehicle and defense programs, so the safety-critical mindset and traceability habits are present. But AS9100 adds configuration management, AS9102 first-article inspection, foreign object debris control, counterfeit-parts prevention, and product-safety risk assessment that a general job shop does not practice. You also inherit the special-process sequencing problem, where heat treat, NDT, and surface finishing must route through accredited sub-tiers, adding lead time and coordination. Practically, sourcing aerospace work here means evaluating not just whether a shop can machine to tolerance but whether it can produce a complete, revision-accurate data package and control its sub-tier chain. The upside of the local market is real proximity for site visits and first-article dispositioning, which matters more on aerospace parts where a single deviation can ground a part until formally dispositioned.

Significant, and it is the most common source of schedule misses on aerospace work sourced through Oshkosh. A part that machines in two to three weeks can stretch to six, eight, or more once you sequence in special processes. Heat treatment, anodize or other chemical processing, and nondestructive testing each add transit time to and from the accredited processor plus that processor's own queue, which fluctuates with aerospace demand cycles. Because not every special process is available locally, parts often travel to regional or out-of-state NADCAP-accredited houses, compounding transit. When you plan a program, build the full routing explicitly: machining, then heat treat, then NDT, then finishing, then final inspection, each with its own queue. Ask the prime supplier for a realistic dock-to-dock estimate that includes sub-tier turnaround, not just their in-house machining time. Negotiating standing slots or blanket releases with key special-process suppliers is the most effective lever for protecting aerospace delivery schedules in this region.