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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.

5331-00-561-6281 (58A1011)

NIIN: 00-561-6281
In stock
NSN: 5331-00-561-6281
FSC Code: 5331
MPN: 58A1011

5331-01-551-3233 (2124759-35)

NIIN: 01-551-3233
In stock
NSN: 5331-01-551-3233
FSC Code: 5331
MPN: 212475935

5331-01-556-0445 (6278E74-P13)

NIIN: 01-556-0445
In stock
NSN: 5331-01-556-0445
FSC Code: 5331
MPN: 6278E74P13

5331-01-551-3234 (2124759-44)

NIIN: 01-551-3234
In stock
NSN: 5331-01-551-3234
FSC Code: 5331
MPN: 212475944

5331-01-258-3801 (589B086TDA)

NIIN: 01-258-3801
In stock
NSN: 5331-01-258-3801
FSC Code: 5331
MPN: 589B086TDA

5331-01-551-3235 (2124759-71)

NIIN: 01-551-3235
In stock
NSN: 5331-01-551-3235
FSC Code: 5331
MPN: 212475971

5331-01-129-8902 (589-B-150-TDA)

NIIN: 01-129-8902
In stock
NSN: 5331-01-129-8902
FSC Code: 5331
MPN: 589B150TDA

5331-01-511-8238 (2-124)

NIIN: 01-511-8238
In stock
NSN: 5331-01-511-8238
FSC Code: 5331
MPN: 2124

5331-15-153-8610 (2-123V747-75)

NIIN: 15-153-8610
In stock
NSN: 5331-15-153-8610
FSC Code: 5331
MPN: 2123V74775

5331-01-549-3471 (2-123)

NIIN: 01-549-3471
In stock
NSN: 5331-01-549-3471
FSC Code: 5331
MPN: 2123

5331-01-290-6081 (58954F133)

NIIN: 01-290-6081
In stock
NSN: 5331-01-290-6081
FSC Code: 5331
MPN: 58954F133

5331-01-290-6080 (58954E080)

NIIN: 01-290-6080
In stock
NSN: 5331-01-290-6080
FSC Code: 5331
MPN: 58954E080

5331-01-466-4006 (2-122C0873-70)

NIIN: 01-466-4006
In stock
NSN: 5331-01-466-4006
FSC Code: 5331
MPN: 2122C087370

5331-01-554-0619 (2-123)

NIIN: 01-554-0619
In stock
NSN: 5331-01-554-0619
FSC Code: 5331
MPN: 2123

5331-00-090-2293 (589498-4)

NIIN: 00-090-2293
In stock
NSN: 5331-00-090-2293
FSC Code: 5331
MPN: 5894984

5331-01-231-5217 (58901A008133)

NIIN: 01-231-5217
In stock
NSN: 5331-01-231-5217
FSC Code: 5331
MPN: 58901A008133

5331-01-095-9388 (58901A008271)

NIIN: 01-095-9388
In stock
NSN: 5331-01-095-9388
FSC Code: 5331
MPN: 58901A008271

5331-01-521-6716 (MIL-STD-129)

NIIN: 01-521-6716
In stock
NSN: 5331-01-521-6716
FSC Code: 5331
MPN: MILSTD129

5331-01-464-1151 (25011-21)

NIIN: 01-464-1151
In stock
NSN: 5331-01-464-1151
FSC Code: 5331
MPN: 2501121

5331-01-386-4074 (2-121E515-80)

NIIN: 01-386-4074
In stock
NSN: 5331-01-386-4074
FSC Code: 5331
MPN: 2121E51580

5331-25-145-9627 (212-1345-30)

NIIN: 25-145-9627
In stock
NSN: 5331-25-145-9627
FSC Code: 5331
MPN: 212134530

5331-01-411-7188 (2-120E540-80CP)

NIIN: 01-411-7188
In stock
NSN: 5331-01-411-7188
FSC Code: 5331
MPN: 2120E54080CP

5331-01-310-5829 (5-885N103-70)

NIIN: 01-310-5829
In stock
NSN: 5331-01-310-5829
FSC Code: 5331
MPN: 5885N10370

5331-00-450-3132 (5885-0003)

NIIN: 00-450-3132
In stock
NSN: 5331-00-450-3132
FSC Code: 5331
MPN: 58850003

5331-01-269-4633 (5883678-0021)

NIIN: 01-269-4633
In stock
NSN: 5331-01-269-4633
FSC Code: 5331
MPN: 58836780021

5331-01-269-4634 (5883678-0090)

NIIN: 01-269-4634
In stock
NSN: 5331-01-269-4634
FSC Code: 5331
MPN: 58836780090

5331-01-269-4635 (5883678-0022)

NIIN: 01-269-4635
In stock
NSN: 5331-01-269-4635
FSC Code: 5331
MPN: 58836780022

5331-25-150-3728 (212-0218-35)

NIIN: 25-150-3728
In stock
NSN: 5331-25-150-3728
FSC Code: 5331
MPN: 212021835

5331-99-826-6875 (RM0291-16VA75)

NIIN: 99-826-6875
In stock
NSN: 5331-99-826-6875
FSC Code: 5331
MPN: RM029116VA75

5331-25-145-9623 (212-0091-16)

NIIN: 25-145-9623
In stock
NSN: 5331-25-145-9623
FSC Code: 5331
MPN: 212009116

5331-01-265-7099 (5876W36-11P02)

NIIN: 01-265-7099
In stock
NSN: 5331-01-265-7099
FSC Code: 5331
MPN: 5876W3611P02

5331-01-467-0912 (29KP565)

NIIN: 01-467-0912
In stock
NSN: 5331-01-467-0912
FSC Code: 5331
MPN: 29KP565

5331-01-432-1768 (2-1198-50-74)

NIIN: 01-432-1768
In stock
NSN: 5331-01-432-1768
FSC Code: 5331
MPN: 211985074

5331-01-526-5921 (2-119-N552-9)

NIIN: 01-526-5921
In stock
NSN: 5331-01-526-5921
FSC Code: 5331
MPN: 2119N5529

5331-01-445-2314 (2-119N522-90)

NIIN: 01-445-2314
In stock
NSN: 5331-01-445-2314
FSC Code: 5331
MPN: 2119N52290

5331-01-478-7826 (3-910E515-80CP)

NIIN: 01-478-7826
In stock
NSN: 5331-01-478-7826
FSC Code: 5331
MPN: 3910E51580CP

5331-01-396-3955 (2-1198-59-38)

NIIN: 01-396-3955
In stock
NSN: 5331-01-396-3955
FSC Code: 5331
MPN: 211985938

5331-01-547-3600 (2-119)

NIIN: 01-547-3600
In stock
NSN: 5331-01-547-3600
FSC Code: 5331
MPN: 2119

5331-01-531-3682 (2-118-S613-60)

NIIN: 01-531-3682
In stock
NSN: 5331-01-531-3682
FSC Code: 5331
MPN: 2118S61360

5331-01-568-5309 (2-119)

NIIN: 01-568-5309
In stock
NSN: 5331-01-568-5309
FSC Code: 5331
MPN: 2119

5331-01-532-0610 (2-118E0740-75)

NIIN: 01-532-0610
In stock
NSN: 5331-01-532-0610
FSC Code: 5331
MPN: 2118E074075

5331-01-376-9698 (2-118A)

NIIN: 01-376-9698
In stock
NSN: 5331-01-376-9698
FSC Code: 5331
MPN: 2118A

5331-01-541-9734 (2-117-C0267-50)

NIIN: 01-541-9734
In stock
NSN: 5331-01-541-9734
FSC Code: 5331
MPN: 2117C026750

5331-01-475-0479 (5331-LL-N01-J654)

NIIN: 01-475-0479
In stock
NSN: 5331-01-475-0479
FSC Code: 5331
MPN: 5331LLN01J654

5331-01-031-4429 (5-869N304-75)

NIIN: 01-031-4429
In stock
NSN: 5331-01-031-4429
FSC Code: 5331
MPN: 5869N30475

5331-01-374-8007 (2-116E515-80)

NIIN: 01-374-8007
In stock
NSN: 5331-01-374-8007
FSC Code: 5331
MPN: 2116E51580

5331-01-377-0599 (2-116A)

NIIN: 01-377-0599
In stock
NSN: 5331-01-377-0599
FSC Code: 5331
MPN: 2116A

5331-01-372-5669 (2-117)

NIIN: 01-372-5669
In stock
NSN: 5331-01-372-5669
FSC Code: 5331
MPN: 2117