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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.

5331-01-571-3557 (8022N7017)

NIIN: 01-571-3557
In stock
NSN: 5331-01-571-3557
FSC Code: 5331
MPN: 8022N7017

5331-01-398-3664 (FF9446-228)

NIIN: 01-398-3664
In stock
NSN: 5331-01-398-3664
FSC Code: 5331
MPN: FF9446228

5331-01-561-1445 (28-P-178)

NIIN: 01-561-1445
In stock
NSN: 5331-01-561-1445
FSC Code: 5331
MPN: 28P178

5331-01-457-3314 (8024N904)

NIIN: 01-457-3314
In stock
NSN: 5331-01-457-3314
FSC Code: 5331
MPN: 8024N904

5331-01-571-1678 (9DD000293)

NIIN: 01-571-1678
In stock
NSN: 5331-01-571-1678
FSC Code: 5331
MPN: 9DD000293

5331-01-489-6176 (25K040016)

NIIN: 01-489-6176
In stock
NSN: 5331-01-489-6176
FSC Code: 5331
MPN: 25K040016

5331-01-469-8147 (25K030508B)

NIIN: 01-469-8147
In stock
NSN: 5331-01-469-8147
FSC Code: 5331
MPN: 25K030508B

5331-01-015-9612 (638H)

NIIN: 01-015-9612
In stock
NSN: 5331-01-015-9612
FSC Code: 5331
MPN: 638H

5331-01-382-7481 (25K-40424)

NIIN: 01-382-7481
In stock
NSN: 5331-01-382-7481
FSC Code: 5331
MPN: 25K40424

5331-01-473-3494 (25K-30812)

NIIN: 01-473-3494
In stock
NSN: 5331-01-473-3494
FSC Code: 5331
MPN: 25K30812

5331-01-437-8705 (25K30408)

NIIN: 01-437-8705
In stock
NSN: 5331-01-437-8705
FSC Code: 5331
MPN: 25K30408

5331-01-421-9268 (25K30424)

NIIN: 01-421-9268
In stock
NSN: 5331-01-421-9268
FSC Code: 5331
MPN: 25K30424

5331-01-525-7622 (25K20007)

NIIN: 01-525-7622
In stock
NSN: 5331-01-525-7622
FSC Code: 5331
MPN: 25K20007

5331-01-415-9001 (25K40128)

NIIN: 01-415-9001
In stock
NSN: 5331-01-415-9001
FSC Code: 5331
MPN: 25K40128

5331-01-488-4359 (25K020400)

NIIN: 01-488-4359
In stock
NSN: 5331-01-488-4359
FSC Code: 5331
MPN: 25K020400

5331-01-483-2786 (25C85-11)

NIIN: 01-483-2786
In stock
NSN: 5331-01-483-2786
FSC Code: 5331
MPN: 25C8511

5331-01-482-7832 (25C85-104)

NIIN: 01-482-7832
In stock
NSN: 5331-01-482-7832
FSC Code: 5331
MPN: 25C85104

5331-01-392-8283 (259-VITON)

NIIN: 01-392-8283
In stock
NSN: 5331-01-392-8283
FSC Code: 5331
MPN: 259VITON

5331-01-462-7458 (25-97386)

NIIN: 01-462-7458
In stock
NSN: 5331-01-462-7458
FSC Code: 5331
MPN: 2597386

5331-01-523-4805 (25-97387)

NIIN: 01-523-4805
In stock
NSN: 5331-01-523-4805
FSC Code: 5331
MPN: 2597387

5331-01-554-2730 (259-6573)

NIIN: 01-554-2730
In stock
NSN: 5331-01-554-2730
FSC Code: 5331
MPN: 2596573

5331-01-566-5898 (2596642C1)

NIIN: 01-566-5898
In stock
NSN: 5331-01-566-5898
FSC Code: 5331
MPN: 2596642C1

5331-01-566-5913 (2594497C1)

NIIN: 01-566-5913
In stock
NSN: 5331-01-566-5913
FSC Code: 5331
MPN: 2594497C1

5331-01-566-5896 (2594496C1)

NIIN: 01-566-5896
In stock
NSN: 5331-01-566-5896
FSC Code: 5331
MPN: 2594496C1

5331-01-566-5888 (2594479C1)

NIIN: 01-566-5888
In stock
NSN: 5331-01-566-5888
FSC Code: 5331
MPN: 2594479C1

5331-15-179-8737 (259-4470)

NIIN: 15-179-8737
In stock
NSN: 5331-15-179-8737
FSC Code: 5331
MPN: 2594470

5331-01-290-0071 (63750-2)

NIIN: 01-290-0071
In stock
NSN: 5331-01-290-0071
FSC Code: 5331
MPN: 637502

5331-01-288-7154 (63750-2)

NIIN: 01-288-7154
In stock
NSN: 5331-01-288-7154
FSC Code: 5331
MPN: 637502

5331-01-288-7155 (63750-2)

NIIN: 01-288-7155
In stock
NSN: 5331-01-288-7155
FSC Code: 5331
MPN: 637502

5331-01-539-2451 (25-90196)

NIIN: 01-539-2451
In stock
NSN: 5331-01-539-2451
FSC Code: 5331
MPN: 2590196

5331-01-499-1078 (25-897536)

NIIN: 01-499-1078
In stock
NSN: 5331-01-499-1078
FSC Code: 5331
MPN: 25897536

5331-01-561-6720 (25-896524)

NIIN: 01-561-6720
In stock
NSN: 5331-01-561-6720
FSC Code: 5331
MPN: 25896524

5331-01-562-3142 (25-895854)

NIIN: 01-562-3142
In stock
NSN: 5331-01-562-3142
FSC Code: 5331
MPN: 25895854

5331-01-561-9174 (25-896523)

NIIN: 01-561-9174
In stock
NSN: 5331-01-561-9174
FSC Code: 5331
MPN: 25896523

5331-01-561-5966 (25-895791)

NIIN: 01-561-5966
In stock
NSN: 5331-01-561-5966
FSC Code: 5331
MPN: 25895791

5331-01-561-9545 (25-895057)

NIIN: 01-561-9545
In stock
NSN: 5331-01-561-9545
FSC Code: 5331
MPN: 25895057

5331-01-561-9180 (25-896522)

NIIN: 01-561-9180
In stock
NSN: 5331-01-561-9180
FSC Code: 5331
MPN: 25896522

5331-01-561-8817 (25-887930)

NIIN: 01-561-8817
In stock
NSN: 5331-01-561-8817
FSC Code: 5331
MPN: 25887930

5331-01-561-7119 (25-896251)

NIIN: 01-561-7119
In stock
NSN: 5331-01-561-7119
FSC Code: 5331
MPN: 25896251

5331-01-562-3092 (25-892317)

NIIN: 01-562-3092
In stock
NSN: 5331-01-562-3092
FSC Code: 5331
MPN: 25892317

5331-01-572-0153 (25-89224001)

NIIN: 01-572-0153
In stock
NSN: 5331-01-572-0153
FSC Code: 5331
MPN: 2589224001

5331-01-539-3439 (25-888354)

NIIN: 01-539-3439
In stock
NSN: 5331-01-539-3439
FSC Code: 5331
MPN: 25888354

5331-01-512-0616 (25-889316-2)

NIIN: 01-512-0616
In stock
NSN: 5331-01-512-0616
FSC Code: 5331
MPN: 258893162

5331-01-561-6724 (25-895854A01)

NIIN: 01-561-6724
In stock
NSN: 5331-01-561-6724
FSC Code: 5331
MPN: 25895854A01

5331-01-562-0348 (25-895056)

NIIN: 01-562-0348
In stock
NSN: 5331-01-562-0348
FSC Code: 5331
MPN: 25895056

5331-01-563-2306 (25-889828)

NIIN: 01-563-2306
In stock
NSN: 5331-01-563-2306
FSC Code: 5331
MPN: 25889828

5331-01-561-7043 (25-888957)

NIIN: 01-561-7043
In stock
NSN: 5331-01-561-7043
FSC Code: 5331
MPN: 25888957

5331-01-561-8796 (25-892445)

NIIN: 01-561-8796
In stock
NSN: 5331-01-561-8796
FSC Code: 5331
MPN: 25892445