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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.

5331-01-426-0047 (50.01.01)

NIIN: 01-426-0047
In stock
NSN: 5331-01-426-0047
FSC Code: 5331
MPN: 500101

5331-01-160-4347 (930-010393X-00)

NIIN: 01-160-4347
In stock
NSN: 5331-01-160-4347
FSC Code: 5331
MPN: 930010393X00

5331-01-426-0046 (50.01.01)

NIIN: 01-426-0046
In stock
NSN: 5331-01-426-0046
FSC Code: 5331
MPN: 500101

5331-01-426-1276 (50.01.01-350MM)

NIIN: 01-426-1276
In stock
NSN: 5331-01-426-1276
FSC Code: 5331
MPN: 500101350MM

5331-01-390-7669 (5.1445.0)

NIIN: 01-390-7669
In stock
NSN: 5331-01-390-7669
FSC Code: 5331
MPN: 514450

5331-01-351-2730 (4W3938)

NIIN: 01-351-2730
In stock
NSN: 5331-01-351-2730
FSC Code: 5331
MPN: 4W3938

5331-01-486-0944 (4W-7356)

NIIN: 01-486-0944
In stock
NSN: 5331-01-486-0944
FSC Code: 5331
MPN: 4W7356

5331-01-351-2732 (4W3937)

NIIN: 01-351-2732
In stock
NSN: 5331-01-351-2732
FSC Code: 5331
MPN: 4W3937

5331-01-146-0502 (929288-15)

NIIN: 01-146-0502
In stock
NSN: 5331-01-146-0502
FSC Code: 5331
MPN: 92928815

5331-01-545-0971 (4T5945)

NIIN: 01-545-0971
In stock
NSN: 5331-01-545-0971
FSC Code: 5331
MPN: 4T5945

5331-01-572-5656 (4T0488)

NIIN: 01-572-5656
In stock
NSN: 5331-01-572-5656
FSC Code: 5331
MPN: 4T0488

5331-01-292-2438 (927970C1)

NIIN: 01-292-2438
In stock
NSN: 5331-01-292-2438
FSC Code: 5331
MPN: 927970C1

5331-01-193-2274 (927-229-730-000)

NIIN: 01-193-2274
In stock
NSN: 5331-01-193-2274
FSC Code: 5331
MPN: 927229730000

5331-01-474-7129 (AT155216)

NIIN: 01-474-7129
In stock
NSN: 5331-01-474-7129
FSC Code: 5331
MPN: AT155216

5331-01-474-9956 (AT132162)

NIIN: 01-474-9956
In stock
NSN: 5331-01-474-9956
FSC Code: 5331
MPN: AT132162

5331-01-475-4382 (AT219565)

NIIN: 01-475-4382
In stock
NSN: 5331-01-475-4382
FSC Code: 5331
MPN: AT219565

5331-01-474-4138 (TH112059)

NIIN: 01-474-4138
In stock
NSN: 5331-01-474-4138
FSC Code: 5331
MPN: TH112059

5331-01-474-9236 (AT217931)

NIIN: 01-474-9236
In stock
NSN: 5331-01-474-9236
FSC Code: 5331
MPN: AT217931

5331-01-474-9249 (AT219505)

NIIN: 01-474-9249
In stock
NSN: 5331-01-474-9249
FSC Code: 5331
MPN: AT219505

5331-01-474-7761 (AT213647)

NIIN: 01-474-7761
In stock
NSN: 5331-01-474-7761
FSC Code: 5331
MPN: AT213647

5331-01-275-1116 (9271B)

NIIN: 01-275-1116
In stock
NSN: 5331-01-275-1116
FSC Code: 5331
MPN: 9271B

5331-01-351-2734 (4R-9116)

NIIN: 01-351-2734
In stock
NSN: 5331-01-351-2734
FSC Code: 5331
MPN: 4R9116

5331-01-193-2273 (927-145-730-000)

NIIN: 01-193-2273
In stock
NSN: 5331-01-193-2273
FSC Code: 5331
MPN: 927145730000

5331-01-346-9399 (4RA1076-5)

NIIN: 01-346-9399
In stock
NSN: 5331-01-346-9399
FSC Code: 5331
MPN: 4RA10765

5331-01-563-0808 (4R)

NIIN: 01-563-0808
In stock
NSN: 5331-01-563-0808
FSC Code: 5331
MPN: 4R

5331-01-193-2272 (927-123-730-000)

NIIN: 01-193-2272
In stock
NSN: 5331-01-193-2272
FSC Code: 5331
MPN: 927123730000

5331-01-439-2546 (CV123239)

NIIN: 01-439-2546
In stock
NSN: 5331-01-439-2546
FSC Code: 5331
MPN: CV123239

5331-01-277-7996 (9265B)

NIIN: 01-277-7996
In stock
NSN: 5331-01-277-7996
FSC Code: 5331
MPN: 9265B

5331-01-277-7998 (9268B)

NIIN: 01-277-7998
In stock
NSN: 5331-01-277-7998
FSC Code: 5331
MPN: 9268B

5331-01-360-2840 (4P4892)

NIIN: 01-360-2840
In stock
NSN: 5331-01-360-2840
FSC Code: 5331
MPN: 4P4892

5331-01-277-7995 (9264B)

NIIN: 01-277-7995
In stock
NSN: 5331-01-277-7995
FSC Code: 5331
MPN: 9264B

5331-01-275-1118 (9263B)

NIIN: 01-275-1118
In stock
NSN: 5331-01-275-1118
FSC Code: 5331
MPN: 9263B

5331-01-275-1114 (9261B)

NIIN: 01-275-1114
In stock
NSN: 5331-01-275-1114
FSC Code: 5331
MPN: 9261B

5331-01-304-9248 (92619-99000)

NIIN: 01-304-9248
In stock
NSN: 5331-01-304-9248
FSC Code: 5331
MPN: 9261999000

5331-01-304-2348 (92619-99001)

NIIN: 01-304-2348
In stock
NSN: 5331-01-304-2348
FSC Code: 5331
MPN: 9261999001

5331-01-146-0501 (926145-19)

NIIN: 01-146-0501
In stock
NSN: 5331-01-146-0501
FSC Code: 5331
MPN: 92614519

5331-01-275-3181 (9260B)

NIIN: 01-275-3181
In stock
NSN: 5331-01-275-3181
FSC Code: 5331
MPN: 9260B

5331-00-849-8447 (925B747P1)

NIIN: 00-849-8447
In stock
NSN: 5331-00-849-8447
FSC Code: 5331
MPN: 925B747P1

5331-01-277-7997 (9259B)

NIIN: 01-277-7997
In stock
NSN: 5331-01-277-7997
FSC Code: 5331
MPN: 9259B

5331-01-276-8444 (9258B)

NIIN: 01-276-8444
In stock
NSN: 5331-01-276-8444
FSC Code: 5331
MPN: 9258B

5331-01-361-0355 (7254-0004)

NIIN: 01-361-0355
In stock
NSN: 5331-01-361-0355
FSC Code: 5331
MPN: 72540004

5331-01-275-3180 (9255B)

NIIN: 01-275-3180
In stock
NSN: 5331-01-275-3180
FSC Code: 5331
MPN: 9255B

5331-01-275-3179 (9254B)

NIIN: 01-275-3179
In stock
NSN: 5331-01-275-3179
FSC Code: 5331
MPN: 9254B

5331-01-282-2163 (925447-0001)

NIIN: 01-282-2163
In stock
NSN: 5331-01-282-2163
FSC Code: 5331
MPN: 9254470001

5331-01-282-2164 (925442-0001)

NIIN: 01-282-2164
In stock
NSN: 5331-01-282-2164
FSC Code: 5331
MPN: 9254420001

5331-01-277-0152 (9252B)

NIIN: 01-277-0152
In stock
NSN: 5331-01-277-0152
FSC Code: 5331
MPN: 9252B

5331-01-275-1115 (9251B)

NIIN: 01-275-1115
In stock
NSN: 5331-01-275-1115
FSC Code: 5331
MPN: 9251B

5331-01-205-9792 (925055-6)

NIIN: 01-205-9792
In stock
NSN: 5331-01-205-9792
FSC Code: 5331
MPN: 9250556