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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 BACR12BM116 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 BACR12BM116 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM117 Ring, Back-Up - 25/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.025 pounds ECCN EAR99 Manufacturer P/N BACR12BM117 Schedule B Code 3926.90.4500 Pack Quantity 25 Series BACR12BM Material TFE Plastic Boeing BACR12BM117 R
Boeing BACR12BM119 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 BACR12BM119 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM120 Ring, Back-Up - 500/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.5 pounds ECCN EAR99 Color Family White Manufacturer P/N BACR12BM120 Schedule B Code 3926.90.4500 Pack Quantity 500 Series BACR12BM Color White Material TF
Boeing BACR12BM121 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 BACR12BM121 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM122 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 BACR12BM122 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM123 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 BACR12BM123 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM128 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 BACR12BM128 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM130 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 BACR12BM130 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM131 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 BACR12BM131 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM132 Ring, Back-Up - 500/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.5 pounds ECCN EAR99 Color Family White Manufacturer P/N BACR12BM132 Schedule B Code 3926.90.4500 Pack Quantity 500 Series BACR12BM Color White Material TF
Boeing BACR12BM135 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 BACR12BM135 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM136 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 BACR12BM136 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM138 Ring, Back-Up - 500/Pack
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.5 pounds ECCN EAR99 Color Family White Manufacturer P/N BACR12BM138 Schedule B Code 3926.90.4500 Pack Quantity 500 Series BACR12BM Color White Material TF
Boeing BACR12BM211 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 BACR12BM211 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM213 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 BACR12BM213 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM214 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 BACR12BM214 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM215 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 BACR12BM215 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM216 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 BACR12BM216 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM217 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 BACR12BM217 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM218 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 BACR12BM218 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM219 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 BACR12BM219 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM220 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 BACR12BM220 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
Boeing BACR12BM221 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 BACR12BM221 Schedule B Code 3926.90.4500 Pack Quantity 5 Series BACR12BM Color White Material TF
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.