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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.

5331-01-363-2971 (12562734-1)

NIIN: 01-363-2971
In stock
NSN: 5331-01-363-2971
FSC Code: 5331
MPN: 125627341

5331-00-821-1716 (3-912V747-75)

NIIN: 00-821-1716
In stock
NSN: 5331-00-821-1716
FSC Code: 5331
MPN: 3912V74775

5331-01-274-2915 (3-912-P648-90)

NIIN: 01-274-2915
In stock
NSN: 5331-01-274-2915
FSC Code: 5331
MPN: 3912P64890

5331-01-245-3228 (3-912N508-75)

NIIN: 01-245-3228
In stock
NSN: 5331-01-245-3228
FSC Code: 5331
MPN: 3912N50875

5331-00-108-5693 (3-912N507-9)

NIIN: 00-108-5693
In stock
NSN: 5331-00-108-5693
FSC Code: 5331
MPN: 3912N5079

5331-01-109-7498 (3-912N299-50)

NIIN: 01-109-7498
In stock
NSN: 5331-01-109-7498
FSC Code: 5331
MPN: 3912N29950

5331-01-333-5213 (391-2884-052)

NIIN: 01-333-5213
In stock
NSN: 5331-01-333-5213
FSC Code: 5331
MPN: 3912884052

5331-01-333-5212 (391-2885-064)

NIIN: 01-333-5212
In stock
NSN: 5331-01-333-5212
FSC Code: 5331
MPN: 3912885064

5331-01-363-2972 (12562734-2)

NIIN: 01-363-2972
In stock
NSN: 5331-01-363-2972
FSC Code: 5331
MPN: 125627342

5331-01-161-2421 (391-2881-403)

NIIN: 01-161-2421
In stock
NSN: 5331-01-161-2421
FSC Code: 5331
MPN: 3912881403

5331-01-173-6603 (391-2881-248)

NIIN: 01-173-6603
In stock
NSN: 5331-01-173-6603
FSC Code: 5331
MPN: 3912881248

5331-01-205-0413 (391-2881-231)

NIIN: 01-205-0413
In stock
NSN: 5331-01-205-0413
FSC Code: 5331
MPN: 3912881231

5331-01-270-3596 (391-2881-124)

NIIN: 01-270-3596
In stock
NSN: 5331-01-270-3596
FSC Code: 5331
MPN: 3912881124

5331-01-206-6828 (391-2881-207)

NIIN: 01-206-6828
In stock
NSN: 5331-01-206-6828
FSC Code: 5331
MPN: 3912881207

5331-01-254-0882 (391-2881-205)

NIIN: 01-254-0882
In stock
NSN: 5331-01-254-0882
FSC Code: 5331
MPN: 3912881205

5331-01-229-4072 (391-2881-105)

NIIN: 01-229-4072
In stock
NSN: 5331-01-229-4072
FSC Code: 5331
MPN: 3912881105

5331-01-233-2948 (391-2881-120)

NIIN: 01-233-2948
In stock
NSN: 5331-01-233-2948
FSC Code: 5331
MPN: 3912881120

5331-01-233-2949 (391-2284-050)

NIIN: 01-233-2949
In stock
NSN: 5331-01-233-2949
FSC Code: 5331
MPN: 3912284050

5331-00-103-9786 (3-912)

NIIN: 00-103-9786
In stock
NSN: 5331-00-103-9786
FSC Code: 5331
MPN: 3912

5331-01-078-5129 (3-912)

NIIN: 01-078-5129
In stock
NSN: 5331-01-078-5129
FSC Code: 5331
MPN: 3912

5331-01-132-1757 (3-912)

NIIN: 01-132-1757
In stock
NSN: 5331-01-132-1757
FSC Code: 5331
MPN: 3912

5331-01-330-2369 (3-911L1077-75)

NIIN: 01-330-2369
In stock
NSN: 5331-01-330-2369
FSC Code: 5331
MPN: 3911L107775

5331-01-279-0497 (3-911E688-70)

NIIN: 01-279-0497
In stock
NSN: 5331-01-279-0497
FSC Code: 5331
MPN: 3911E68870

5331-01-226-5948 (3-911-47-071)

NIIN: 01-226-5948
In stock
NSN: 5331-01-226-5948
FSC Code: 5331
MPN: 391147071

5331-01-267-5518 (3-910V-9)

NIIN: 01-267-5518
In stock
NSN: 5331-01-267-5518
FSC Code: 5331
MPN: 3910V9

5331-00-165-1975 (3-911)

NIIN: 00-165-1975
In stock
NSN: 5331-00-165-1975
FSC Code: 5331
MPN: 3911

5331-01-055-3872 (3-910E505-80)

NIIN: 01-055-3872
In stock
NSN: 5331-01-055-3872
FSC Code: 5331
MPN: 3910E50580

5331-01-102-8393 (3910N304-75)

NIIN: 01-102-8393
In stock
NSN: 5331-01-102-8393
FSC Code: 5331
MPN: 3910N30475

5331-01-038-2123 (3-910-N1231-80)

NIIN: 01-038-2123
In stock
NSN: 5331-01-038-2123
FSC Code: 5331
MPN: 3910N123180

5331-01-203-3240 (3-910N179-70)

NIIN: 01-203-3240
In stock
NSN: 5331-01-203-3240
FSC Code: 5331
MPN: 3910N17970

5331-01-198-5490 (3-910E652-90)

NIIN: 01-198-5490
In stock
NSN: 5331-01-198-5490
FSC Code: 5331
MPN: 3910E65290

5331-01-270-8312 (3910E810-80)

NIIN: 01-270-8312
In stock
NSN: 5331-01-270-8312
FSC Code: 5331
MPN: 3910E81080

5331-01-015-6657 (3-910C557-70)

NIIN: 01-015-6657
In stock
NSN: 5331-01-015-6657
FSC Code: 5331
MPN: 3910C55770

5331-01-129-3136 (3-910)

NIIN: 01-129-3136
In stock
NSN: 5331-01-129-3136
FSC Code: 5331
MPN: 3910

5331-00-165-1974 (3-909)

NIIN: 00-165-1974
In stock
NSN: 5331-00-165-1974
FSC Code: 5331
MPN: 3909

5331-01-215-7328 (3-908TEFLON)

NIIN: 01-215-7328
In stock
NSN: 5331-01-215-7328
FSC Code: 5331
MPN: 3908TEFLON

5331-00-005-8166 (3-908-NA151)

NIIN: 00-005-8166
In stock
NSN: 5331-00-005-8166
FSC Code: 5331
MPN: 3908NA151

5331-01-050-8199 (3-908S355-7)

NIIN: 01-050-8199
In stock
NSN: 5331-01-050-8199
FSC Code: 5331
MPN: 3908S3557

5331-01-250-0656 (3-908N508-75)

NIIN: 01-250-0656
In stock
NSN: 5331-01-250-0656
FSC Code: 5331
MPN: 3908N50875

5331-00-819-3851 (3-908-E688-70)

NIIN: 00-819-3851
In stock
NSN: 5331-00-819-3851
FSC Code: 5331
MPN: 3908E68870

5331-00-135-0976 (3-908S0455-70)

NIIN: 00-135-0976
In stock
NSN: 5331-00-135-0976
FSC Code: 5331
MPN: 3908S045570

5331-00-968-2193 (3-908N219-7)

NIIN: 00-968-2193
In stock
NSN: 5331-00-968-2193
FSC Code: 5331
MPN: 3908N2197

5331-00-225-7648 (3908N-9)

NIIN: 00-225-7648
In stock
NSN: 5331-00-225-7648
FSC Code: 5331
MPN: 3908N9

5331-00-946-7099 (3-908-E515-80)

NIIN: 00-946-7099
In stock
NSN: 5331-00-946-7099
FSC Code: 5331
MPN: 3908E51580

5331-01-104-4900 (3-908E692-75)

NIIN: 01-104-4900
In stock
NSN: 5331-01-104-4900
FSC Code: 5331
MPN: 3908E69275

5331-01-088-7967 (3-908)

NIIN: 01-088-7967
In stock
NSN: 5331-01-088-7967
FSC Code: 5331
MPN: 3908

5331-00-916-9421 (3-908C526-7)

NIIN: 00-916-9421
In stock
NSN: 5331-00-916-9421
FSC Code: 5331
MPN: 3908C5267

5331-01-042-8241 (3-908-11647)

NIIN: 01-042-8241
In stock
NSN: 5331-01-042-8241
FSC Code: 5331
MPN: 390811647