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

BACR12BM116
Boeing BACR12BM116 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100789-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM117
Boeing BACR12BM117 Ring, Back-Up - 25/Pack
Boeing
SKU SGP168101-X25
Observed pack 25/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 25 ea)
Open compare View part RFQ
BACR12BM119
Boeing BACR12BM119 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100791-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM120
Boeing BACR12BM120 Ring, Back-Up - 500/Pack
Boeing
SKU SGP100792-X500
Observed pack 500/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 500 ea)
Open compare View part RFQ
BACR12BM121
Boeing BACR12BM121 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100793-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM122
Boeing BACR12BM122 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100794-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM123
Boeing BACR12BM123 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100795-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM128
Boeing BACR12BM128 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100796-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM130
Boeing BACR12BM130 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100797-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM131
Boeing BACR12BM131 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100798-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM132
Boeing BACR12BM132 Ring, Back-Up - 500/Pack
Boeing
SKU SGP100799-X500
Observed pack 500/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 500 ea)
Open compare View part RFQ
BACR12BM135
Boeing BACR12BM135 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100800-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM136
Boeing BACR12BM136 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100801-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM138
Boeing BACR12BM138 Ring, Back-Up - 500/Pack
Boeing
SKU SGP100802-X500
Observed pack 500/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 500 ea)
Open compare View part RFQ
BACR12BM211
Boeing BACR12BM211 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100803-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM213
Boeing BACR12BM213 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100804-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM214
Boeing BACR12BM214 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100805-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM215
Boeing BACR12BM215 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100806-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM216
Boeing BACR12BM216 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100807-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM217
Boeing BACR12BM217 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100808-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM218
Boeing BACR12BM218 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100809-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM219
Boeing BACR12BM219 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100810-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM220
Boeing BACR12BM220 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100811-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ
BACR12BM221
Boeing BACR12BM221 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100812-X5
Observed pack 5/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 5 ea)
Open compare View part RFQ

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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