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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 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
Military Standard MS16624-1025 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-720-8064 Alternate PN#s MS16624-25, NAS670-25 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1025 Schedule B Code 8710.00.0090 Pack Quantity
Military Standard MS16624-1031 Steel Ring, Retaining - 100/Pack
Approvals and Conformities NSN 5325-00-803-7313 Product Attributes Country of Origin United States Shipping Weight 0.3 pounds ECCN 9A991.d Manufacturer P/N MS16624-1031 Schedule B Code 8710.00.0090 Pack Quantity 100 Series MS16624 Shaft Size 5/16" Se
Military Standard MS16624-1037 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-715-1152 MIL-SPEC# MIL-R-21248 Alternate PN#s 5100-37, 9415235 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1037 Schedule B Code 8710.00.0
Military Standard MS16624-1043 Steel Ring, Retaining - 18/Pack
Approvals and Conformities NSN 5325-00-803-7315 Product Attributes Country of Origin United States Shipping Weight 0.054 pounds ECCN 9A991.d Manufacturer P/N MS16624-1043 Schedule B Code 8710.00.0090 Pack Quantity 18 Ship Dimensions 1 x 1 x 0 inches
Military Standard MS16624-1046 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-721-8360 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1046 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-1050 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-803-7301 Alternate PN#s MS16624-12 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1050 Schedule B Code 8710.00.0090 Pack Quantity 1 Series M
Military Standard MS16624-1059 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-754-1619 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1059 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-1062 Steel Ring, Retaining - 10/Pack
Approvals and Conformities NSN 5325-00-803-7305 Product Attributes Country of Origin United States Shipping Weight 0.03 pounds ECCN 9A991.d Manufacturer P/N MS16624-1062 Schedule B Code 8710.00.0090 Pack Quantity 10 Series MS16624 Shaft Size 5/8" Ser
Military Standard MS16624-1081 Steel Ring, Retaining
Approvals and Conformities Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN EAR99 Manufacturer P/N MS16624-1081 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard MS16624-1081 Steel Ring,
Military Standard MS16624-1087 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-804-2025 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1087 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Series MS16624 Mate
Military Standard MS16624-1098 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-804-2026 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1098 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-1131 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-803-7317 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1131 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-1143 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-530-7957 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1143 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-1150 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-803-7299 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-1150 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Series MS16624 Mate
Military Standard MS16624-175 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-721-6476 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-175 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard MS
Military Standard MS16624-2025 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-526-2674 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-2025 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-2037 Steel Ring, Retaining - 90/Pack
Approvals and Conformities NSN 5325-00-282-6978 Product Attributes Country of Origin United States Shipping Weight 0.27 pounds ECCN 9A991.d Manufacturer P/N MS16624-2037 Schedule B Code 8710.00.0090 Pack Quantity 90 Series MS16624 Series MS16624 Mate
Military Standard MS16624-2039 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-282-5290 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN 9A991.d Manufacturer P/N MS16624-2039 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard M
Military Standard MS16624-2059 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-282-5318 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN EAR99 Manufacturer P/N MS16624-2059 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard MS1
Military Standard MS16624-2066 Steel Ring, Retaining - 21/Pack
Approvals and Conformities NSN 5325-00-282-6956 Product Attributes Country of Origin United States Shipping Weight 0.063 pounds ECCN 9A991.d Manufacturer P/N MS16624-2066 Schedule B Code 8710.00.0090 Pack Quantity 21 Series MS16624 Military Standard
Military Standard MS16624-2075 Steel Ring, Retaining
Approvals and Conformities NSN 5325-00-803-7303 Product Attributes Country of Origin United States Shipping Weight 0.003 pounds ECCN EAR99 Manufacturer P/N MS16624-2075 Schedule B Code 8710.00.0090 Pack Quantity 1 Series MS16624 Military Standard MS1
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.