Aerospace O-rings and gaskets, to the specification on your print

Aerospace buying is specification buying. The print names a document and a size, and the job is getting a part that was built to that document, from a source that is allowed to build it, with paperwork a quality department will accept. Most of the difficulty is in the third part.

For aerospace seals beyond O-rings, see the aerospace seals page: how an order is supplied and documented.

What we supply against your print

Hydraulic and fuel-system O-rings, boss seals, and the fluorosilicone and fluorocarbon parts that fuel contact calls for. Both resist fuel; the fluorosilicone vs FKM guide shows where each one fits. Flat gaskets are cut to your drawing on our own waterjet in Orange, California, from a DXF, with no tooling. Molded parts and rubber-to-metal bonded parts are made to your print by the molders we source from.

The mil-spec chart lists the documents and the sizes against them. The M83248 and AMS7276 guides decode the two callouts that come up most.

When the print names a cancelled document

It happens constantly, and it is not a problem. A drawing that still reads MIL-R-83248 refers to a document that was cancelled and replaced; we quote the current document, name both on the certificate and confirm with you before ordering, so the paperwork matches the drawing you are buying to. The register further down this page lists the documents we see most and what each one became.

If your drawing names something not on that list, send it anyway. Checking it beats guessing.

What ships with the part

A certificate of conformance naming the part number, the specification, the manufacturer, the lot, the quantity and the manufacturer's cure date, and the manufacturer's batch test report where the program calls for one. Conquest Seal is not itself on a qualified products list. A listing names the manufacturer, or a distributor the manufacturer has authorized, and the Conquest certificate names the manufacturer of your parts; the QPL guide shows how to check one. Tell us at the quote stage if your receiving inspection needs anything beyond that. How the sourcing, the lot traceability and the certificate work in detail is on the aerospace seals traceability and paperwork page.

Please don't send a drawing marked ITAR, EAR, CUI or export-controlled. For those parts, call (714) 632-9830.