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

75 owned part identities in this path

Parts in this category

75 PartsPerk-owned part identities in this path.

Grid Table

All manufacturers AIRBUS Boeing Military Standard

BACR12BM222
Boeing BACR12BM222 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100813-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
BACR12BM223
Boeing BACR12BM223 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100814-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
BACR12BM224
Boeing BACR12BM224 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100815-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
BACR12BM225
Boeing BACR12BM225 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100816-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
BACR12BM226
Boeing BACR12BM226 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100817-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
BACR12BM228
Boeing BACR12BM228 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100818-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
BACR12BM229
Boeing BACR12BM229 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100819-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
BACR12BM230
Boeing BACR12BM230 Ring, Back-Up - 5/Pack
Boeing
SKU SGP184550-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
BACR12BM231
Boeing BACR12BM231 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100820-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
BACR12BM232
Boeing BACR12BM232 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100821-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
BACR12BM233
Boeing BACR12BM233 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100822-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
BACR12BM234
Boeing BACR12BM234 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100823-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
BACR12BM235
Boeing BACR12BM235 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100824-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
BACR12BM236
Boeing BACR12BM236 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100825-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
BACR12BM237
Boeing BACR12BM237 Ring, Back-Up - 250/Pack
Boeing
SKU SGP184269-X250
Observed pack 250/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 250 ea)
Open compare View part RFQ
BACR12BM240
Boeing BACR12BM240 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100826-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
BACR12BM326
Boeing BACR12BM326 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100827-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
BACR12BM328
Boeing BACR12BM328 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100828-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
BACR12BM330
Boeing BACR12BM330 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100829-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
BACR12BM331
Boeing BACR12BM331 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100830-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
BACR12BM333
Boeing BACR12BM333 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100831-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
BACR12BM334
Boeing BACR12BM334 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100832-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
BACR12BM342
Boeing BACR12BM342 Ring, Back-Up - 5/Pack
Boeing
SKU SGP100833-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
BACR12BM348
Boeing BACR12BM348 Ring, Back-Up - 250/Pack
Boeing
SKU SGP100836-X250
Observed pack 250/Pack · sale increment 1
- Country of Origin: United States
- Material: TFE Plastic
- Observed pack description: Pack - (Pack = 250 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

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