Skip to content

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.

5331-01-166-2621 (3-903-E515-8)

NIIN: 01-166-2621
In stock
NSN: 5331-01-166-2621
FSC Code: 5331
MPN: 3903E5158

5331-01-415-1941 (1250-9155)

NIIN: 01-415-1941
In stock
NSN: 5331-01-415-1941
FSC Code: 5331
MPN: 12509155

5331-01-569-2607 (12508570-003)

NIIN: 01-569-2607
In stock
NSN: 5331-01-569-2607
FSC Code: 5331
MPN: 12508570003

5331-01-566-0577 (12508570-002)

NIIN: 01-566-0577
In stock
NSN: 5331-01-566-0577
FSC Code: 5331
MPN: 12508570002

5331-01-315-8730 (390365-01-7)

NIIN: 01-315-8730
In stock
NSN: 5331-01-315-8730
FSC Code: 5331
MPN: 390365017

5331-00-558-1326 (3-903)

NIIN: 00-558-1326
In stock
NSN: 5331-00-558-1326
FSC Code: 5331
MPN: 3903

5331-00-869-3641 (3-902V747-75)

NIIN: 00-869-3641
In stock
NSN: 5331-00-869-3641
FSC Code: 5331
MPN: 3902V74775

5331-00-910-4541 (3-902N683)

NIIN: 00-910-4541
In stock
NSN: 5331-00-910-4541
FSC Code: 5331
MPN: 3902N683

5331-00-008-5324 (3-902N552-90)

NIIN: 00-008-5324
In stock
NSN: 5331-00-008-5324
FSC Code: 5331
MPN: 3902N55290

5331-00-394-7126 (3-902-S383-70)

NIIN: 00-394-7126
In stock
NSN: 5331-00-394-7126
FSC Code: 5331
MPN: 3902S38370

5331-01-098-2928 (3-902L1223-60)

NIIN: 01-098-2928
In stock
NSN: 5331-01-098-2928
FSC Code: 5331
MPN: 3902L122360

5331-01-567-8712 (12505287-101)

NIIN: 01-567-8712
In stock
NSN: 5331-01-567-8712
FSC Code: 5331
MPN: 12505287101

5331-01-453-2863 (S07963-002)

NIIN: 01-453-2863
In stock
NSN: 5331-01-453-2863
FSC Code: 5331
MPN: S07963002

5331-00-599-0543 (3-902PSI-30-5)

NIIN: 00-599-0543
In stock
NSN: 5331-00-599-0543
FSC Code: 5331
MPN: 3902PSI305

5331-00-152-7030 (3-902B612-7)

NIIN: 00-152-7030
In stock
NSN: 5331-00-152-7030
FSC Code: 5331
MPN: 3902B6127

5331-01-249-4228 (3-902E540-80)

NIIN: 01-249-4228
In stock
NSN: 5331-01-249-4228
FSC Code: 5331
MPN: 3902E54080

5331-01-022-9018 (3-902)

NIIN: 01-022-9018
In stock
NSN: 5331-01-022-9018
FSC Code: 5331
MPN: 3902

5331-01-123-6049 (3-902-2)

NIIN: 01-123-6049
In stock
NSN: 5331-01-123-6049
FSC Code: 5331
MPN: 39022

5331-01-422-0712 (12-501-249)

NIIN: 01-422-0712
In stock
NSN: 5331-01-422-0712
FSC Code: 5331
MPN: 12501249

5331-00-663-7667 (3900-201PCGASKET24)

NIIN: 00-663-7667
In stock
NSN: 5331-00-663-7667
FSC Code: 5331
MPN: 3900201PCGASKET24

5331-00-023-7553 (3-8V587-9)

NIIN: 00-023-7553
In stock
NSN: 5331-00-023-7553
FSC Code: 5331
MPN: 38V5879

5331-00-910-7379 (3-8S424-7)

NIIN: 00-910-7379
In stock
NSN: 5331-00-910-7379
FSC Code: 5331
MPN: 38S4247

5331-01-183-0991 (38R065P150)

NIIN: 01-183-0991
In stock
NSN: 5331-01-183-0991
FSC Code: 5331
MPN: 38R065P150

5331-00-224-1014 (3-8N122-6)

NIIN: 00-224-1014
In stock
NSN: 5331-00-224-1014
FSC Code: 5331
MPN: 38N1226

5331-00-288-1963 (3-8C147-7)

NIIN: 00-288-1963
In stock
NSN: 5331-00-288-1963
FSC Code: 5331
MPN: 38C1477

5331-01-394-4507 (1248944H1)

NIIN: 01-394-4507
In stock
NSN: 5331-01-394-4507
FSC Code: 5331
MPN: 1248944H1

5331-00-840-1417 (3-8B480-7)

NIIN: 00-840-1417
In stock
NSN: 5331-00-840-1417
FSC Code: 5331
MPN: 38B4807

5331-01-538-3486 (12474029-8)

NIIN: 01-538-3486
In stock
NSN: 5331-01-538-3486
FSC Code: 5331
MPN: 124740298

5331-01-527-3353 (12474029-6)

NIIN: 01-527-3353
In stock
NSN: 5331-01-527-3353
FSC Code: 5331
MPN: 124740296

5331-01-527-3359 (12474029-3)

NIIN: 01-527-3359
In stock
NSN: 5331-01-527-3359
FSC Code: 5331
MPN: 124740293

5331-01-527-3361 (12474029-5)

NIIN: 01-527-3361
In stock
NSN: 5331-01-527-3361
FSC Code: 5331
MPN: 124740295

5331-01-527-3360 (12474029-4)

NIIN: 01-527-3360
In stock
NSN: 5331-01-527-3360
FSC Code: 5331
MPN: 124740294

5331-01-137-9007 (3899B-3)

NIIN: 01-137-9007
In stock
NSN: 5331-01-137-9007
FSC Code: 5331
MPN: 3899B3

5331-01-538-6263 (12474029-2)

NIIN: 01-538-6263
In stock
NSN: 5331-01-538-6263
FSC Code: 5331
MPN: 124740292

5331-01-547-2487 (12474029-7)

NIIN: 01-547-2487
In stock
NSN: 5331-01-547-2487
FSC Code: 5331
MPN: 124740297

5331-01-495-4820 (2-017N117370)

NIIN: 01-495-4820
In stock
NSN: 5331-01-495-4820
FSC Code: 5331
MPN: 2017N117370

5331-01-495-4814 (2-015N117370)

NIIN: 01-495-4814
In stock
NSN: 5331-01-495-4814
FSC Code: 5331
MPN: 2015N117370

5331-00-081-0091 (3890-12)

NIIN: 00-081-0091
In stock
NSN: 5331-00-081-0091
FSC Code: 5331
MPN: 389012

5331-01-495-4801 (2-011N117370)

NIIN: 01-495-4801
In stock
NSN: 5331-01-495-4801
FSC Code: 5331
MPN: 2011N117370

5331-01-495-4810 (2-013N117370)

NIIN: 01-495-4810
In stock
NSN: 5331-01-495-4810
FSC Code: 5331
MPN: 2013N117370

5331-00-182-3159 (388-8306)

NIIN: 00-182-3159
In stock
NSN: 5331-00-182-3159
FSC Code: 5331
MPN: 3888306

5331-01-522-1359 (12438370-017)

NIIN: 01-522-1359
In stock
NSN: 5331-01-522-1359
FSC Code: 5331
MPN: 12438370017

5331-01-455-7990 (12438505-2)

NIIN: 01-455-7990
In stock
NSN: 5331-01-455-7990
FSC Code: 5331
MPN: 124385052

5331-01-522-3502 (12438370-020)

NIIN: 01-522-3502
In stock
NSN: 5331-01-522-3502
FSC Code: 5331
MPN: 12438370020

5331-01-522-1346 (12438370-906)

NIIN: 01-522-1346
In stock
NSN: 5331-01-522-1346
FSC Code: 5331
MPN: 12438370906

5331-01-522-2465 (12438370-016)

NIIN: 01-522-2465
In stock
NSN: 5331-01-522-2465
FSC Code: 5331
MPN: 12438370016

5331-01-456-0989 (12438504-2)

NIIN: 01-456-0989
In stock
NSN: 5331-01-456-0989
FSC Code: 5331
MPN: 124385042

5331-01-522-1381 (12438370-014)

NIIN: 01-522-1381
In stock
NSN: 5331-01-522-1381
FSC Code: 5331
MPN: 12438370014