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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.

5331-01-340-3908 (EXC6147-32)

NIIN: 01-340-3908
In stock
NSN: 5331-01-340-3908
FSC Code: 5331
MPN: EXC614732

5331-01-140-8849 (USCD-10172-1)

NIIN: 01-140-8849
In stock
NSN: 5331-01-140-8849
FSC Code: 5331
MPN: USCD101721

5331-01-433-3386 (LL-H37-4337)

NIIN: 01-433-3386
In stock
NSN: 5331-01-433-3386
FSC Code: 5331
MPN: LLH374337

5331-01-483-1232 (EW-2300AB)

NIIN: 01-483-1232
In stock
NSN: 5331-01-483-1232
FSC Code: 5331
MPN: EW2300AB

5331-01-435-1257 (EVMKII-5)

NIIN: 01-435-1257
In stock
NSN: 5331-01-435-1257
FSC Code: 5331
MPN: EVMKII5

5331-01-532-8321 (ES-KAUAA000904)

NIIN: 01-532-8321
In stock
NSN: 5331-01-532-8321
FSC Code: 5331
MPN: ESKAUAA000904

5331-01-532-8325 (ES-KAUAA000910)

NIIN: 01-532-8325
In stock
NSN: 5331-01-532-8325
FSC Code: 5331
MPN: ESKAUAA000910

5331-01-572-4239 (ES-87)

NIIN: 01-572-4239
In stock
NSN: 5331-01-572-4239
FSC Code: 5331
MPN: ES87

5331-01-453-1557 (ES49011-1)

NIIN: 01-453-1557
In stock
NSN: 5331-01-453-1557
FSC Code: 5331
MPN: ES490111

5331-01-453-1556 (ES49011-3)

NIIN: 01-453-1556
In stock
NSN: 5331-01-453-1556
FSC Code: 5331
MPN: ES490113

5331-01-453-1555 (ES49011-2)

NIIN: 01-453-1555
In stock
NSN: 5331-01-453-1555
FSC Code: 5331
MPN: ES490112

5331-00-875-2610 (UB3006-17)

NIIN: 00-875-2610
In stock
NSN: 5331-00-875-2610
FSC Code: 5331
MPN: UB300617

5331-01-303-2845 (UAP2310-03250)

NIIN: 01-303-2845
In stock
NSN: 5331-01-303-2845
FSC Code: 5331
MPN: UAP231003250

5331-00-031-2006 (UA3006-44)

NIIN: 00-031-2006
In stock
NSN: 5331-00-031-2006
FSC Code: 5331
MPN: UA300644

5331-00-173-8032 (UA3006-43)

NIIN: 00-173-8032
In stock
NSN: 5331-00-173-8032
FSC Code: 5331
MPN: UA300643

5331-00-159-1472 (UA3006-13)

NIIN: 00-159-1472
In stock
NSN: 5331-00-159-1472
FSC Code: 5331
MPN: UA300613

5331-01-284-7882 (U9-161)

NIIN: 01-284-7882
In stock
NSN: 5331-01-284-7882
FSC Code: 5331
MPN: U9161

5331-01-258-1507 (U6495-557)

NIIN: 01-258-1507
In stock
NSN: 5331-01-258-1507
FSC Code: 5331
MPN: U6495557

5331-01-143-6311 (U6495-556)

NIIN: 01-143-6311
In stock
NSN: 5331-01-143-6311
FSC Code: 5331
MPN: U6495556

5331-00-369-5414 (U610278-1)

NIIN: 00-369-5414
In stock
NSN: 5331-00-369-5414
FSC Code: 5331
MPN: U6102781

5331-00-020-7093 (U523124-34)

NIIN: 00-020-7093
In stock
NSN: 5331-00-020-7093
FSC Code: 5331
MPN: U52312434

5331-00-007-1029 (U524222)

NIIN: 00-007-1029
In stock
NSN: 5331-00-007-1029
FSC Code: 5331
MPN: U524222

5331-00-914-2874 (U518518-6)

NIIN: 00-914-2874
In stock
NSN: 5331-00-914-2874
FSC Code: 5331
MPN: U5185186

5331-01-197-3208 (U45857)

NIIN: 01-197-3208
In stock
NSN: 5331-01-197-3208
FSC Code: 5331
MPN: U45857

5331-01-277-4214 (U42111)

NIIN: 01-277-4214
In stock
NSN: 5331-01-277-4214
FSC Code: 5331
MPN: U42111

5331-01-237-7554 (U42029)

NIIN: 01-237-7554
In stock
NSN: 5331-01-237-7554
FSC Code: 5331
MPN: U42029

5331-00-828-5836 (U31550-01)

NIIN: 00-828-5836
In stock
NSN: 5331-00-828-5836
FSC Code: 5331
MPN: U3155001

5331-00-817-4214 (U31615-01)

NIIN: 00-817-4214
In stock
NSN: 5331-00-817-4214
FSC Code: 5331
MPN: U3161501

5331-01-305-0671 (U2228)

NIIN: 01-305-0671
In stock
NSN: 5331-01-305-0671
FSC Code: 5331
MPN: U2228

5331-00-918-7248 (U212)

NIIN: 00-918-7248
In stock
NSN: 5331-00-918-7248
FSC Code: 5331
MPN: U212

5331-01-312-7166 (U17409)

NIIN: 01-312-7166
In stock
NSN: 5331-01-312-7166
FSC Code: 5331
MPN: U17409

5331-01-265-1209 (U-1731-010)

NIIN: 01-265-1209
In stock
NSN: 5331-01-265-1209
FSC Code: 5331
MPN: U1731010

5331-01-266-2489 (U-1720-113)

NIIN: 01-266-2489
In stock
NSN: 5331-01-266-2489
FSC Code: 5331
MPN: U1720113

5331-01-265-1208 (U-1720-010)

NIIN: 01-265-1208
In stock
NSN: 5331-01-265-1208
FSC Code: 5331
MPN: U1720010

5331-01-197-3212 (U15415)

NIIN: 01-197-3212
In stock
NSN: 5331-01-197-3212
FSC Code: 5331
MPN: U15415

5331-01-257-9152 (U13639)

NIIN: 01-257-9152
In stock
NSN: 5331-01-257-9152
FSC Code: 5331
MPN: U13639

5331-01-106-9574 (U12547)

NIIN: 01-106-9574
In stock
NSN: 5331-01-106-9574
FSC Code: 5331
MPN: U12547

5331-00-056-9580 (U12037U)

NIIN: 00-056-9580
In stock
NSN: 5331-00-056-9580
FSC Code: 5331
MPN: U12037U

5331-00-056-3773 (U12547U)

NIIN: 00-056-3773
In stock
NSN: 5331-00-056-3773
FSC Code: 5331
MPN: U12547U

5331-01-111-9282 (U12331)

NIIN: 01-111-9282
In stock
NSN: 5331-01-111-9282
FSC Code: 5331
MPN: U12331

5331-01-257-4321 (U11326)

NIIN: 01-257-4321
In stock
NSN: 5331-01-257-4321
FSC Code: 5331
MPN: U11326

5331-01-106-9573 (U10778)

NIIN: 01-106-9573
In stock
NSN: 5331-01-106-9573
FSC Code: 5331
MPN: U10778

5331-01-195-1512 (U10289)

NIIN: 01-195-1512
In stock
NSN: 5331-01-195-1512
FSC Code: 5331
MPN: U10289

5331-01-270-8154 (U11061)

NIIN: 01-270-8154
In stock
NSN: 5331-01-270-8154
FSC Code: 5331
MPN: U11061

5331-01-095-3862 (U10776)

NIIN: 01-095-3862
In stock
NSN: 5331-01-095-3862
FSC Code: 5331
MPN: U10776

5331-01-305-0670 (U1015)

NIIN: 01-305-0670
In stock
NSN: 5331-01-305-0670
FSC Code: 5331
MPN: U1015

5331-00-712-8926 (U(BI-20S))

NIIN: 00-712-8926
In stock
NSN: 5331-00-712-8926
FSC Code: 5331
MPN: UBI20S

5331-01-226-4443 (TYT-9A-62)

NIIN: 01-226-4443
In stock
NSN: 5331-01-226-4443
FSC Code: 5331
MPN: TYT9A62