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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.

5331-01-197-3208 (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

5331-01-226-4442 (TYT-9B-62)

NIIN: 01-226-4442
In stock
NSN: 5331-01-226-4442
FSC Code: 5331
MPN: TYT9B62

5331-01-561-3774 (EP-015-70-OR)

NIIN: 01-561-3774
In stock
NSN: 5331-01-561-3774
FSC Code: 5331
MPN: EP01570OR

5331-01-561-3776 (EP-014-70-OR)

NIIN: 01-561-3776
In stock
NSN: 5331-01-561-3776
FSC Code: 5331
MPN: EP01470OR

5331-01-171-6316 (TU89)

NIIN: 01-171-6316
In stock
NSN: 5331-01-171-6316
FSC Code: 5331
MPN: TU89

5331-01-464-6074 (EM47092-14)

NIIN: 01-464-6074
In stock
NSN: 5331-01-464-6074
FSC Code: 5331
MPN: EM4709214

5331-00-641-0439 (TT70342-10)

NIIN: 00-641-0439
In stock
NSN: 5331-00-641-0439
FSC Code: 5331
MPN: TT7034210

5331-01-428-2743 (EL-40200PR)

NIIN: 01-428-2743
In stock
NSN: 5331-01-428-2743
FSC Code: 5331
MPN: EL40200PR

5331-01-214-1913 (TSE21-188-12)

NIIN: 01-214-1913
In stock
NSN: 5331-01-214-1913
FSC Code: 5331
MPN: TSE2118812

5331-01-432-2904 (EL-100-PC27)

NIIN: 01-432-2904
In stock
NSN: 5331-01-432-2904
FSC Code: 5331
MPN: EL100PC27

5331-01-432-2924 (EL-100-PC95)

NIIN: 01-432-2924
In stock
NSN: 5331-01-432-2924
FSC Code: 5331
MPN: EL100PC95

5331-01-432-2908 (EL-100-PC52)

NIIN: 01-432-2908
In stock
NSN: 5331-01-432-2908
FSC Code: 5331
MPN: EL100PC52

5331-01-432-2923 (EL-100-PC94)

NIIN: 01-432-2923
In stock
NSN: 5331-01-432-2923
FSC Code: 5331
MPN: EL100PC94

5331-01-432-2906 (EL-100-PC62)

NIIN: 01-432-2906
In stock
NSN: 5331-01-432-2906
FSC Code: 5331
MPN: EL100PC62

5331-01-432-2909 (EL-100-PC57)

NIIN: 01-432-2909
In stock
NSN: 5331-01-432-2909
FSC Code: 5331
MPN: EL100PC57

5331-01-432-2902 (EL-100-PC21)

NIIN: 01-432-2902
In stock
NSN: 5331-01-432-2902
FSC Code: 5331
MPN: EL100PC21

5331-00-251-4238 (TS33-277-1225)

NIIN: 00-251-4238
In stock
NSN: 5331-00-251-4238
FSC Code: 5331
MPN: TS332771225

5331-01-314-6770 (TS-277-2100)

NIIN: 01-314-6770
In stock
NSN: 5331-01-314-6770
FSC Code: 5331
MPN: TS2772100

5331-01-523-8876 (EK-0360)

NIIN: 01-523-8876
In stock
NSN: 5331-01-523-8876
FSC Code: 5331
MPN: EK0360

5331-01-119-7154 (TS1046G010-70)

NIIN: 01-119-7154
In stock
NSN: 5331-01-119-7154
FSC Code: 5331
MPN: TS1046G01070

5331-01-267-6186 (TS1046C149)

NIIN: 01-267-6186
In stock
NSN: 5331-01-267-6186
FSC Code: 5331
MPN: TS1046C149

5331-01-267-6185 (TS1046C041)

NIIN: 01-267-6185
In stock
NSN: 5331-01-267-6185
FSC Code: 5331
MPN: TS1046C041

5331-01-267-6182 (TS1046C006)

NIIN: 01-267-6182
In stock
NSN: 5331-01-267-6182
FSC Code: 5331
MPN: TS1046C006

5331-01-229-7838 (TS1046C011)

NIIN: 01-229-7838
In stock
NSN: 5331-01-229-7838
FSC Code: 5331
MPN: TS1046C011