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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.
145 owned part identities in this path
145 PartsPerk-owned parts in Back-up rings
Boeing BACR12BM222 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Color Family White Manufacturer P/N BACR12BM222 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM223 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Color Family White Manufacturer P/N BACR12BM223 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM224 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.035 pounds ECCN EAR99 Manufacturer P/N BACR12BM224 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM224 Ri
Boeing BACR12BM225 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 BACR12BM225 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM225 Ring
Boeing BACR12BM226 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 2.5 pounds ECCN EAR99 Manufacturer P/N BACR12BM226 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM226 Ring
Boeing BACR12BM228 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.04 pounds ECCN EAR99 Manufacturer P/N BACR12BM228 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM228 Rin
Boeing BACR12BM229 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 BACR12BM229 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM229 Ring
Boeing BACR12BM230 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Manufacturer P/N BACR12BM230 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM230 PT
Boeing BACR12BM231 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 BACR12BM231 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM231 Ring
Boeing BACR12BM232 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Manufacturer P/N BACR12BM232 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM232 Ri
Boeing BACR12BM233 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 BACR12BM233 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM233 Ring
Boeing BACR12BM234 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 BACR12BM234 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM234 Ring
Boeing BACR12BM235 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 BACR12BM235 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM235 Ring
Boeing BACR12BM236 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Manufacturer P/N BACR12BM236 Schedule B Code 3926.90.4500 Pack Quantity 5 Ship Dimensions 4 x 4 x 0 inches Series BACR12BM Material
Boeing BACR12BM237 Ring, Back-Up - 250/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.25 pounds ECCN EAR99 Manufacturer P/N BACR12BM237 Schedule B Code 3926.90.4500 Pack Quantity 250 Series BACR12BM Material TFE Plastic Boeing BACR12BM237 R
Boeing BACR12BM240 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.15 pounds ECCN EAR99 Manufacturer P/N BACR12BM240 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM240 Rin
Boeing BACR12BM326 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 BACR12BM326 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM326 Ring
Boeing BACR12BM328 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 BACR12BM328 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM328 Ring
Boeing BACR12BM330 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 BACR12BM330 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM330 Ring
Boeing BACR12BM331 Ring, Back-Up - 5/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.005 pounds ECCN EAR99 Manufacturer P/N BACR12BM331 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM331 Ri
Boeing BACR12BM333 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 BACR12BM333 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM333 Ring
Boeing BACR12BM334 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 BACR12BM334 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM334 Ring
Boeing BACR12BM342 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 BACR12BM342 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Material TFE Plastic Boeing BACR12BM342 Ring
Boeing BACR12BM348 Ring, Back-Up - 250/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 25 pounds ECCN EAR99 Manufacturer P/N BACR12BM348 Schedule B Code 3926.90.4500 Pack Quantity 250 Series BACR12BM Material TFE Plastic Boeing BACR12BM348 Rin
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.