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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.

5331-01-308-1209 (MD072821)

NIIN: 01-308-1209
In stock
NSN: 5331-01-308-1209
FSC Code: 5331
MPN: MD072821

5331-01-568-0145 (90X3V70)

NIIN: 01-568-0145
In stock
NSN: 5331-01-568-0145
FSC Code: 5331
MPN: 90X3V70

5331-01-257-4785 (MD020718)

NIIN: 01-257-4785
In stock
NSN: 5331-01-257-4785
FSC Code: 5331
MPN: MD020718

5331-01-394-6422 (90OA62P124)

NIIN: 01-394-6422
In stock
NSN: 5331-01-394-6422
FSC Code: 5331
MPN: 90OA62P124

5331-01-538-2876 (90DFF-20)

NIIN: 01-538-2876
In stock
NSN: 5331-01-538-2876
FSC Code: 5331
MPN: 90DFF20

5331-01-538-4219 (90DFF-16)

NIIN: 01-538-4219
In stock
NSN: 5331-01-538-4219
FSC Code: 5331
MPN: 90DFF16

5331-01-538-1716 (90DFF-6)

NIIN: 01-538-1716
In stock
NSN: 5331-01-538-1716
FSC Code: 5331
MPN: 90DFF6

5331-01-538-4351 (90DFF-12)

NIIN: 01-538-4351
In stock
NSN: 5331-01-538-4351
FSC Code: 5331
MPN: 90DFF12

5331-01-547-9464 (90DB-10)

NIIN: 01-547-9464
In stock
NSN: 5331-01-547-9464
FSC Code: 5331
MPN: 90DB10

5331-00-145-2438 (MC9643)

NIIN: 00-145-2438
In stock
NSN: 5331-00-145-2438
FSC Code: 5331
MPN: MC9643

5331-01-380-9110 (909920-5860)

NIIN: 01-380-9110
In stock
NSN: 5331-01-380-9110
FSC Code: 5331
MPN: 9099205860

5331-00-145-2434 (MC9642)

NIIN: 00-145-2434
In stock
NSN: 5331-00-145-2434
FSC Code: 5331
MPN: MC9642

5331-99-517-2174 (90-977-326)

NIIN: 99-517-2174
In stock
NSN: 5331-99-517-2174
FSC Code: 5331
MPN: 90977326

5331-99-662-7165 (90-977-212)

NIIN: 99-662-7165
In stock
NSN: 5331-99-662-7165
FSC Code: 5331
MPN: 90977212

5331-99-662-7166 (90-977-228)

NIIN: 99-662-7166
In stock
NSN: 5331-99-662-7166
FSC Code: 5331
MPN: 90977228

5331-01-380-9155 (9-0956-2106-0)

NIIN: 01-380-9155
In stock
NSN: 5331-01-380-9155
FSC Code: 5331
MPN: 9095621060

5331-01-480-0816 (909561-2530)

NIIN: 01-480-0816
In stock
NSN: 5331-01-480-0816
FSC Code: 5331
MPN: 9095612530

5331-22-269-0115 (90901-28-0724)

NIIN: 22-269-0115
In stock
NSN: 5331-22-269-0115
FSC Code: 5331
MPN: 90901280724

5331-22-269-0114 (90901-28-0368)

NIIN: 22-269-0114
In stock
NSN: 5331-22-269-0114
FSC Code: 5331
MPN: 90901280368

5331-01-559-9789 (908E201-ITEM32)

NIIN: 01-559-9789
In stock
NSN: 5331-01-559-9789
FSC Code: 5331
MPN: 908E201ITEM32

5331-01-559-9787 (908E201-ITEM31)

NIIN: 01-559-9787
In stock
NSN: 5331-01-559-9787
FSC Code: 5331
MPN: 908E201ITEM31

5331-01-559-9503 (908E205-ITEM15)

NIIN: 01-559-9503
In stock
NSN: 5331-01-559-9503
FSC Code: 5331
MPN: 908E205ITEM15

5331-01-559-9784 (908E201-ITEM29)

NIIN: 01-559-9784
In stock
NSN: 5331-01-559-9784
FSC Code: 5331
MPN: 908E201ITEM29

5331-01-559-9786 (908E201-ITEM30)

NIIN: 01-559-9786
In stock
NSN: 5331-01-559-9786
FSC Code: 5331
MPN: 908E201ITEM30

5331-01-469-1076 (908A0012B63)

NIIN: 01-469-1076
In stock
NSN: 5331-01-469-1076
FSC Code: 5331
MPN: 908A0012B63

5331-00-761-3293 (MC6109)

NIIN: 00-761-3293
In stock
NSN: 5331-00-761-3293
FSC Code: 5331
MPN: MC6109

5331-22-269-0110 (90806-05-1521)

NIIN: 22-269-0110
In stock
NSN: 5331-22-269-0110
FSC Code: 5331
MPN: 90806051521

5331-22-269-0112 (90806-05-2233)

NIIN: 22-269-0112
In stock
NSN: 5331-22-269-0112
FSC Code: 5331
MPN: 90806052233

5331-22-269-0113 (90806-05-2500)

NIIN: 22-269-0113
In stock
NSN: 5331-22-269-0113
FSC Code: 5331
MPN: 90806052500

5331-22-269-0096 (90801-29-3712)

NIIN: 22-269-0096
In stock
NSN: 5331-22-269-0096
FSC Code: 5331
MPN: 90801293712

5331-01-500-8526 (908011-0050)

NIIN: 01-500-8526
In stock
NSN: 5331-01-500-8526
FSC Code: 5331
MPN: 9080110050

5331-01-500-8527 (908012-0470)

NIIN: 01-500-8527
In stock
NSN: 5331-01-500-8527
FSC Code: 5331
MPN: 9080120470

5331-22-269-0094 (90801-29-2000)

NIIN: 22-269-0094
In stock
NSN: 5331-22-269-0094
FSC Code: 5331
MPN: 90801292000

5331-00-965-6472 (MC2688)

NIIN: 00-965-6472
In stock
NSN: 5331-00-965-6472
FSC Code: 5331
MPN: MC2688

5331-01-424-1837 (9799-733ITEM10)

NIIN: 01-424-1837
In stock
NSN: 5331-01-424-1837
FSC Code: 5331
MPN: 9799733ITEM10

5331-01-396-2253 (9079-014-420)

NIIN: 01-396-2253
In stock
NSN: 5331-01-396-2253
FSC Code: 5331
MPN: 9079014420

5331-22-269-0089 (90706-08-2006)

NIIN: 22-269-0089
In stock
NSN: 5331-22-269-0089
FSC Code: 5331
MPN: 90706082006

5331-22-269-0086 (90706-08-1394)

NIIN: 22-269-0086
In stock
NSN: 5331-22-269-0086
FSC Code: 5331
MPN: 90706081394

5331-22-269-0087 (90706-08-1750)

NIIN: 22-269-0087
In stock
NSN: 5331-22-269-0087
FSC Code: 5331
MPN: 90706081750

5331-22-269-0090 (90706-08-3629)

NIIN: 22-269-0090
In stock
NSN: 5331-22-269-0090
FSC Code: 5331
MPN: 90706083629

5331-22-269-0091 (90706-08-3996)

NIIN: 22-269-0091
In stock
NSN: 5331-22-269-0091
FSC Code: 5331
MPN: 90706083996

5331-01-013-0220 (MC10035)

NIIN: 01-013-0220
In stock
NSN: 5331-01-013-0220
FSC Code: 5331
MPN: MC10035

5331-00-630-8249 (MC09639)

NIIN: 00-630-8249
In stock
NSN: 5331-00-630-8249
FSC Code: 5331
MPN: MC09639

5331-01-315-1556 (MBN95)

NIIN: 01-315-1556
In stock
NSN: 5331-01-315-1556
FSC Code: 5331
MPN: MBN95

5331-01-125-8287 (MBEU-66957)

NIIN: 01-125-8287
In stock
NSN: 5331-01-125-8287
FSC Code: 5331
MPN: MBEU66957

5331-01-143-1778 (MBEU-66461)

NIIN: 01-143-1778
In stock
NSN: 5331-01-143-1778
FSC Code: 5331
MPN: MBEU66461

5331-01-125-6859 (MBEU-65707)

NIIN: 01-125-6859
In stock
NSN: 5331-01-125-6859
FSC Code: 5331
MPN: MBEU65707

5331-01-125-7527 (MBEU-65976)

NIIN: 01-125-7527
In stock
NSN: 5331-01-125-7527
FSC Code: 5331
MPN: MBEU65976