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Hardware
Back-up rings for aviation maintenance and overhaul sourcing. Search by manufacturer part number or NSN. Listings are PartsPerk-owned observations for review — not live inventory or airworthiness approval.
75 owned part identities in this path
75 PartsPerk-owned parts in Back-up rings
Boeing BACR12BM349 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.1 pounds ECCN EAR99 Manufacturer P/N BACR12BM349 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM349 Ring
Boeing BACR12BM432 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.5 pounds ECCN EAR99 Manufacturer P/N BACR12BM432 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM432 Ring
Boeing BACR12BM433 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.5 pounds ECCN EAR99 Manufacturer P/N BACR12BM433 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM433 Ring
Start with the manufacturer part number from the illustrated parts catalog or maintenance manual. If an NSN is listed, search that next. Confirm finish, dash number, and engine or airframe applicability before opening an RFQ.
No. Category pages show PartsPerk-owned observations for sourcing review. Stock, price, trace, and airworthiness stay off the page until a separate publication review.
Yes. Submit quantity, required documents, and need-by date through the sourcing desk. Volume review is human — these pages do not auto-discount.
PartsPerk catalog pages show PartsPerk-owned observations only. They are not live stock, not certification, and not OEM affiliation. Exact PN/NSN identity is for sourcing review; publication and sellability require separate approval.