Hardware

Back-up rings

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.

Search PN / NSN Request sourcing

145 owned part identities in this path

Parts in this category

145 PartsPerk-owned part identities in this path.

Grid Table

All manufacturers AIRBUS Boeing Military Standard

BACR12BM349
Boeing BACR12BM349 Ring, Back-Up - 5/Pack
Boeing
SKU SGP184551-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
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BACR12BM432
Boeing BACR12BM432 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100837-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
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BACR12BM433
Boeing BACR12BM433 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100838-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
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MS16624-1025
Military Standard MS16624-1025 Steel Ring, Retaining
Military Standard
SKU SGP133063
NSN 5325-00-720-8064
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Each
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MS16624-1031
Military Standard MS16624-1031 Steel Ring, Retaining - 100/Pack
Military Standard
SKU SGP133064-X100
Observed pack 100/Pack · sale increment 1
NSN 5325-00-803-7313
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Pack - (Pack = 100 ea)
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MS16624-1037
Military Standard MS16624-1037 Steel Ring, Retaining
Military Standard
SKU SGP133065
NSN 5325-00-715-1152
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Each
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MS16624-1043
Military Standard MS16624-1043 Steel Ring, Retaining - 18/Pack
Military Standard
SKU SGP133067-X18
Observed pack 18/Pack · sale increment 1
NSN 5325-00-803-7315
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Pack - (Pack = 18 ea)
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MS16624-1046
Military Standard MS16624-1046 Steel Ring, Retaining
Military Standard
SKU SGP133068
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-721-8360
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1050
Military Standard MS16624-1050 Steel Ring, Retaining
Military Standard
SKU SGP133069
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-803-7301
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Each
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MS16624-1059
Military Standard MS16624-1059 Steel Ring, Retaining
Military Standard
SKU SGP133071
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-754-1619
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1062
Military Standard MS16624-1062 Steel Ring, Retaining - 10/Pack
Military Standard
SKU SGP133072-X10
Observed pack 10/Pack · sale increment 1
NSN 5325-00-803-7305
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Pack - (Pack = 10 ea)
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MS16624-1081
Military Standard MS16624-1081 Steel Ring, Retaining
Military Standard
SKU SGP181791
Observed pack Pack Quantity 1 · sale increment 1
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1087
Military Standard MS16624-1087 Steel Ring, Retaining
Military Standard
SKU SGP133074
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-804-2025
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Each
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MS16624-1098
Military Standard MS16624-1098 Steel Ring, Retaining
Military Standard
SKU SGP133075
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-804-2026
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1131
Military Standard MS16624-1131 Steel Ring, Retaining
Military Standard
SKU SGP133077
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-803-7317
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1143
Military Standard MS16624-1143 Steel Ring, Retaining
Military Standard
SKU SGP133078
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-530-7957
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-1150
Military Standard MS16624-1150 Steel Ring, Retaining
Military Standard
SKU SGP133079
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-803-7299
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Each
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MS16624-175
Military Standard MS16624-175 Steel Ring, Retaining
Military Standard
SKU SGP133080
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-721-6476
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-2025
Military Standard MS16624-2025 Steel Ring, Retaining
Military Standard
SKU SGP133081
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-526-2674
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-2037
Military Standard MS16624-2037 Steel Ring, Retaining - 90/Pack
Military Standard
SKU SGP133082-X90
Observed pack 90/Pack · sale increment 1
NSN 5325-00-282-6978
- Country of Origin: United States
- Material: Cadmium Plated Steel
- Observed pack description: Pack - (Pack = 90 ea)
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MS16624-2039
Military Standard MS16624-2039 Steel Ring, Retaining
Military Standard
SKU SGP133083
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-282-5290
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-2059
Military Standard MS16624-2059 Steel Ring, Retaining
Military Standard
SKU SGP133085
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-282-5318
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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MS16624-2066
Military Standard MS16624-2066 Steel Ring, Retaining - 21/Pack
Military Standard
SKU SGP133087-X21
Observed pack 21/Pack · sale increment 1
NSN 5325-00-282-6956
- Country of Origin: United States
- Observed pack description: Pack - (Pack = 21 ea)
- Observed unit of measure: 21/Pack
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MS16624-2075
Military Standard MS16624-2075 Steel Ring, Retaining
Military Standard
SKU SGP133088
Observed pack Pack Quantity 1 · sale increment 1
NSN 5325-00-803-7303
- Country of Origin: United States
- Observed pack description: Each
- Observed unit of measure: Each
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Related hardware

Frequently asked questions

How do I pick the correct part?

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.

Are these listings in stock or certified?

No. Category pages show PartsPerk-owned observations for sourcing review. Stock, price, trace, and airworthiness stay off the page until a separate publication review.

Can fleet and shop orders be reviewed together?

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.

Back-up rings

Parts in this category

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