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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.

5331-01-388-8537 (01-435-0190-5)

NIIN: 01-388-8537
In stock
NSN: 5331-01-388-8537
FSC Code: 5331
MPN: 0143501905

5331-00-922-7967 (238-5118)

NIIN: 00-922-7967
In stock
NSN: 5331-00-922-7967
FSC Code: 5331
MPN: 2385118

5331-01-088-5240 (238-5225)

NIIN: 01-088-5240
In stock
NSN: 5331-01-088-5240
FSC Code: 5331
MPN: 2385225

5331-01-314-6774 (238-5118)

NIIN: 01-314-6774
In stock
NSN: 5331-01-314-6774
FSC Code: 5331
MPN: 2385118

5331-01-322-8634 (238-5131)

NIIN: 01-322-8634
In stock
NSN: 5331-01-322-8634
FSC Code: 5331
MPN: 2385131

5331-00-757-7535 (238-5219)

NIIN: 00-757-7535
In stock
NSN: 5331-00-757-7535
FSC Code: 5331
MPN: 2385219

5331-01-353-5990 (01-435-0355-4)

NIIN: 01-353-5990
In stock
NSN: 5331-01-353-5990
FSC Code: 5331
MPN: 0143503554

5331-01-393-6820 (01-435-0419-4)

NIIN: 01-393-6820
In stock
NSN: 5331-01-393-6820
FSC Code: 5331
MPN: 0143504194

5331-01-189-3629 (238-5260)

NIIN: 01-189-3629
In stock
NSN: 5331-01-189-3629
FSC Code: 5331
MPN: 2385260

5331-01-395-7826 (01-435-0418-4)

NIIN: 01-395-7826
In stock
NSN: 5331-01-395-7826
FSC Code: 5331
MPN: 0143504184

5331-01-395-2157 (01-435-0420-4-ITEM-44-11)

NIIN: 01-395-2157
In stock
NSN: 5331-01-395-2157
FSC Code: 5331
MPN: 0143504204ITEM4411

5331-01-393-6822 (01-435-0419-4)

NIIN: 01-393-6822
In stock
NSN: 5331-01-393-6822
FSC Code: 5331
MPN: 0143504194

5331-01-071-2942 (238-5251)

NIIN: 01-071-2942
In stock
NSN: 5331-01-071-2942
FSC Code: 5331
MPN: 2385251

5331-01-395-7824 (01-435-0418-4)

NIIN: 01-395-7824
In stock
NSN: 5331-01-395-7824
FSC Code: 5331
MPN: 0143504184

5331-01-393-6821 (CN1-Q4249-366Y)

NIIN: 01-393-6821
In stock
NSN: 5331-01-393-6821
FSC Code: 5331
MPN: CN1Q4249366Y

5331-01-393-6817 (01-435-0419-4)

NIIN: 01-393-6817
In stock
NSN: 5331-01-393-6817
FSC Code: 5331
MPN: 0143504194

5331-99-438-4069 (01-438-4069)

NIIN: 99-438-4069
In stock
NSN: 5331-99-438-4069
FSC Code: 5331
MPN: 014384069

5331-00-045-7410 (238-5238)

NIIN: 00-045-7410
In stock
NSN: 5331-00-045-7410
FSC Code: 5331
MPN: 2385238

5331-00-432-8349 (238-5342)

NIIN: 00-432-8349
In stock
NSN: 5331-00-432-8349
FSC Code: 5331
MPN: 2385342

5331-01-368-9093 (01-435-0408-4)

NIIN: 01-368-9093
In stock
NSN: 5331-01-368-9093
FSC Code: 5331
MPN: 0143504084

5331-01-395-2156 (01-435-0420-4-ITEM-42-4)

NIIN: 01-395-2156
In stock
NSN: 5331-01-395-2156
FSC Code: 5331
MPN: 0143504204ITEM424

5331-14-373-0226 (169-3X5-7-6770010)

NIIN: 14-373-0226
In stock
NSN: 5331-14-373-0226
FSC Code: 5331
MPN: 1693X576770010

5331-01-007-4912 (2-385C147-7)

NIIN: 01-007-4912
In stock
NSN: 5331-01-007-4912
FSC Code: 5331
MPN: 2385C1477

5331-00-274-6482 (2386002A4)

NIIN: 00-274-6482
In stock
NSN: 5331-00-274-6482
FSC Code: 5331
MPN: 2386002A4

5331-01-305-9402 (2385J420-31)

NIIN: 01-305-9402
In stock
NSN: 5331-01-305-9402
FSC Code: 5331
MPN: 2385J42031

5331-01-069-6349 (238-5269)

NIIN: 01-069-6349
In stock
NSN: 5331-01-069-6349
FSC Code: 5331
MPN: 2385269

5331-01-314-6775 (238-6008)

NIIN: 01-314-6775
In stock
NSN: 5331-01-314-6775
FSC Code: 5331
MPN: 2386008

5331-01-069-9312 (238-6112)

NIIN: 01-069-9312
In stock
NSN: 5331-01-069-9312
FSC Code: 5331
MPN: 2386112

5331-00-757-7540 (238-6248)

NIIN: 00-757-7540
In stock
NSN: 5331-00-757-7540
FSC Code: 5331
MPN: 2386248

5331-00-556-8246 (238-6119)

NIIN: 00-556-8246
In stock
NSN: 5331-00-556-8246
FSC Code: 5331
MPN: 2386119

5331-00-556-8211 (238-6124)

NIIN: 00-556-8211
In stock
NSN: 5331-00-556-8211
FSC Code: 5331
MPN: 2386124

5331-01-135-2813 (2-387)

NIIN: 01-135-2813
In stock
NSN: 5331-01-135-2813
FSC Code: 5331
MPN: 2387

5331-01-005-0534 (2-387)

NIIN: 01-005-0534
In stock
NSN: 5331-01-005-0534
FSC Code: 5331
MPN: 2387

5331-00-245-4588 (2-387MILR25897)

NIIN: 00-245-4588
In stock
NSN: 5331-00-245-4588
FSC Code: 5331
MPN: 2387MILR25897

5331-01-031-8234 (2-388)

NIIN: 01-031-8234
In stock
NSN: 5331-01-031-8234
FSC Code: 5331
MPN: 2388

5331-01-031-8244 (2-389)

NIIN: 01-031-8244
In stock
NSN: 5331-01-031-8244
FSC Code: 5331
MPN: 2389

5331-01-548-7393 (014-R00612-103-70BNT)

NIIN: 01-548-7393
In stock
NSN: 5331-01-548-7393
FSC Code: 5331
MPN: 014R0061210370BNT

5331-01-245-0732 (23881-014)

NIIN: 01-245-0732
In stock
NSN: 5331-01-245-0732
FSC Code: 5331
MPN: 23881014

5331-01-005-0535 (2-388-V747-75)

NIIN: 01-005-0535
In stock
NSN: 5331-01-005-0535
FSC Code: 5331
MPN: 2388V74775

5331-14-390-8238 (01500C5000A24B7)

NIIN: 14-390-8238
In stock
NSN: 5331-14-390-8238
FSC Code: 5331
MPN: 01500C5000A24B7

5331-01-020-5262 (2-389)

NIIN: 01-020-5262
In stock
NSN: 5331-01-020-5262
FSC Code: 5331
MPN: 2389

5331-14-358-9514 (01500C5000A20B7)

NIIN: 14-358-9514
In stock
NSN: 5331-14-358-9514
FSC Code: 5331
MPN: 01500C5000A20B7

5331-14-387-2571 (01500C5000A23B7)

NIIN: 14-387-2571
In stock
NSN: 5331-14-387-2571
FSC Code: 5331
MPN: 01500C5000A23B7

5331-14-343-7386 (01500C5000A21B6)

NIIN: 14-343-7386
In stock
NSN: 5331-14-343-7386
FSC Code: 5331
MPN: 01500C5000A21B6

5331-00-950-4507 (239-001-0011)

NIIN: 00-950-4507
In stock
NSN: 5331-00-950-4507
FSC Code: 5331
MPN: 2390010011

5331-00-950-7652 (239-001-0001)

NIIN: 00-950-7652
In stock
NSN: 5331-00-950-7652
FSC Code: 5331
MPN: 2390010001

5331-01-179-0599 (2-390)

NIIN: 01-179-0599
In stock
NSN: 5331-01-179-0599
FSC Code: 5331
MPN: 2390

5331-00-950-4503 (239-006-0001)

NIIN: 00-950-4503
In stock
NSN: 5331-00-950-4503
FSC Code: 5331
MPN: 2390060001