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O-Rings

FSC 5331: O-Rings

Federal Supply Class (FSC) 5331 covers O-rings, the round-section elastomeric seals used to seal static and dynamic joints. The catalog includes O-rings built to AS568, MIL-SPEC, and industry standards.

O-rings seal connections in hydraulic, pneumatic, fuel, and fluid systems by compressing in a groove. They are among the most widely used sealing elements in machinery.

Common materials include nitrile (Buna-N), fluorocarbon (Viton), silicone, EPDM, and PTFE, selected for fluid compatibility and temperature range. Sizes follow standard dash-number series for repeatable replacement.

5331-01-451-0451 (UF3-06)

NIIN: 01-451-0451
In stock
NSN: 5331-01-451-0451
FSC Code: 5331
MPN: UF306

5331-01-451-0530 (UF5-06)

NIIN: 01-451-0530
In stock
NSN: 5331-01-451-0530
FSC Code: 5331
MPN: UF506

5331-01-451-0513 (UF3-05)

NIIN: 01-451-0513
In stock
NSN: 5331-01-451-0513
FSC Code: 5331
MPN: UF305

5331-01-366-7836 (UA3352)

NIIN: 01-366-7836
In stock
NSN: 5331-01-366-7836
FSC Code: 5331
MPN: UA3352

5331-01-551-1863 (U80008832)

NIIN: 01-551-1863
In stock
NSN: 5331-01-551-1863
FSC Code: 5331
MPN: U80008832

5331-01-551-2311 (U80055294)

NIIN: 01-551-2311
In stock
NSN: 5331-01-551-2311
FSC Code: 5331
MPN: U80055294

5331-01-392-9512 (U76-0330-400)

NIIN: 01-392-9512
In stock
NSN: 5331-01-392-9512
FSC Code: 5331
MPN: U760330400

5331-01-374-5368 (U536961-3)

NIIN: 01-374-5368
In stock
NSN: 5331-01-374-5368
FSC Code: 5331
MPN: U5369613

5331-01-374-5369 (U536961)

NIIN: 01-374-5369
In stock
NSN: 5331-01-374-5369
FSC Code: 5331
MPN: U536961

5331-01-374-5370 (U536961-1)

NIIN: 01-374-5370
In stock
NSN: 5331-01-374-5370
FSC Code: 5331
MPN: U5369611

5331-01-551-0651 (U43352)

NIIN: 01-551-0651
In stock
NSN: 5331-01-551-0651
FSC Code: 5331
MPN: U43352

5331-01-397-0343 (U46155)

NIIN: 01-397-0343
In stock
NSN: 5331-01-397-0343
FSC Code: 5331
MPN: U46155

5331-01-378-7281 (U44590)

NIIN: 01-378-7281
In stock
NSN: 5331-01-378-7281
FSC Code: 5331
MPN: U44590

5331-01-550-3177 (U42702)

NIIN: 01-550-3177
In stock
NSN: 5331-01-550-3177
FSC Code: 5331
MPN: U42702

5331-01-570-3156 (U15980)

NIIN: 01-570-3156
In stock
NSN: 5331-01-570-3156
FSC Code: 5331
MPN: U15980

5331-01-570-3115 (U15149)

NIIN: 01-570-3115
In stock
NSN: 5331-01-570-3115
FSC Code: 5331
MPN: U15149

5331-01-540-6828 (U10746)

NIIN: 01-540-6828
In stock
NSN: 5331-01-540-6828
FSC Code: 5331
MPN: U10746

5331-01-571-1343 (U11343)

NIIN: 01-571-1343
In stock
NSN: 5331-01-571-1343
FSC Code: 5331
MPN: U11343

5331-01-567-9659 (U12198)

NIIN: 01-567-9659
In stock
NSN: 5331-01-567-9659
FSC Code: 5331
MPN: U12198

5331-01-462-6299 (U-10009CP)

NIIN: 01-462-6299
In stock
NSN: 5331-01-462-6299
FSC Code: 5331
MPN: U10009CP

5331-99-980-8572 (U.155-1)

NIIN: 99-980-8572
In stock
NSN: 5331-99-980-8572
FSC Code: 5331
MPN: U1551

5331-01-415-5277 (TZ56)

NIIN: 01-415-5277
In stock
NSN: 5331-01-415-5277
FSC Code: 5331
MPN: TZ56

5331-01-559-5841 (TX70-ATS)

NIIN: 01-559-5841
In stock
NSN: 5331-01-559-5841
FSC Code: 5331
MPN: TX70ATS

5331-01-559-5863 (TX70-ATS)

NIIN: 01-559-5863
In stock
NSN: 5331-01-559-5863
FSC Code: 5331
MPN: TX70ATS

5331-14-554-9075 (TWVL02500-N6610)

NIIN: 14-554-9075
In stock
NSN: 5331-14-554-9075
FSC Code: 5331
MPN: TWVL02500N6610

5331-01-451-0476 (TW28-55)

NIIN: 01-451-0476
In stock
NSN: 5331-01-451-0476
FSC Code: 5331
MPN: TW2855

5331-01-363-1792 (TU34104)

NIIN: 01-363-1792
In stock
NSN: 5331-01-363-1792
FSC Code: 5331
MPN: TU34104

5331-01-363-1791 (TU22100)

NIIN: 01-363-1791
In stock
NSN: 5331-01-363-1791
FSC Code: 5331
MPN: TU22100

5331-01-468-7613 (TT-15-5-200)

NIIN: 01-468-7613
In stock
NSN: 5331-01-468-7613
FSC Code: 5331
MPN: TT155200

5331-01-433-8111 (TT-15-100)

NIIN: 01-433-8111
In stock
NSN: 5331-01-433-8111
FSC Code: 5331
MPN: TT15100

5331-01-387-8310 (TSY-SB01)

NIIN: 01-387-8310
In stock
NSN: 5331-01-387-8310
FSC Code: 5331
MPN: TSYSB01

5331-01-387-8415 (TSY-SB01)

NIIN: 01-387-8415
In stock
NSN: 5331-01-387-8415
FSC Code: 5331
MPN: TSYSB01

5331-01-422-0696 (TSQ257-7)

NIIN: 01-422-0696
In stock
NSN: 5331-01-422-0696
FSC Code: 5331
MPN: TSQ2577

5331-01-523-6444 (TS1046-B-055)

NIIN: 01-523-6444
In stock
NSN: 5331-01-523-6444
FSC Code: 5331
MPN: TS1046B055

5331-01-490-2704 (TRRG30)

NIIN: 01-490-2704
In stock
NSN: 5331-01-490-2704
FSC Code: 5331
MPN: TRRG30

5331-01-461-8297 (TK214)

NIIN: 01-461-8297
In stock
NSN: 5331-01-461-8297
FSC Code: 5331
MPN: TK214

5331-01-572-6399 (TIF2500-PSN)

NIIN: 01-572-6399
In stock
NSN: 5331-01-572-6399
FSC Code: 5331
MPN: TIF2500PSN

5331-01-361-4642 (TIB-709-E/FIG.55)

NIIN: 01-361-4642
In stock
NSN: 5331-01-361-4642
FSC Code: 5331
MPN: TIB709EFIG55

5331-01-511-8048 (TH4420958)

NIIN: 01-511-8048
In stock
NSN: 5331-01-511-8048
FSC Code: 5331
MPN: TH4420958

5331-01-511-8065 (TH4396774)

NIIN: 01-511-8065
In stock
NSN: 5331-01-511-8065
FSC Code: 5331
MPN: TH4396774

5331-01-424-3496 (TH23030-3-8)

NIIN: 01-424-3496
In stock
NSN: 5331-01-424-3496
FSC Code: 5331
MPN: TH2303038

5331-01-424-3501 (TH23030-5-1)

NIIN: 01-424-3501
In stock
NSN: 5331-01-424-3501
FSC Code: 5331
MPN: TH2303051

5331-01-424-3500 (TH23030-4-8)

NIIN: 01-424-3500
In stock
NSN: 5331-01-424-3500
FSC Code: 5331
MPN: TH2303048

5331-01-424-3497 (TH23030-3-9)

NIIN: 01-424-3497
In stock
NSN: 5331-01-424-3497
FSC Code: 5331
MPN: TH2303039

5331-01-475-3910 (TH102992)

NIIN: 01-475-3910
In stock
NSN: 5331-01-475-3910
FSC Code: 5331
MPN: TH102992

5331-01-474-0282 (TH105683)

NIIN: 01-474-0282
In stock
NSN: 5331-01-474-0282
FSC Code: 5331
MPN: TH105683

5331-01-474-0020 (TH102793)

NIIN: 01-474-0020
In stock
NSN: 5331-01-474-0020
FSC Code: 5331
MPN: TH102793

5331-01-474-0086 (TH102560)

NIIN: 01-474-0086
In stock
NSN: 5331-01-474-0086
FSC Code: 5331
MPN: TH102560