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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.

5331-01-151-1044 (AS3551-143)

NIIN: 01-151-1044
In stock
NSN: 5331-01-151-1044
FSC Code: 5331
MPN: AS3551143

5331-00-081-6910 (AS3551-111)

NIIN: 00-081-6910
In stock
NSN: 5331-00-081-6910
FSC Code: 5331
MPN: AS3551111

5331-00-115-1357 (AS3551-136)

NIIN: 00-115-1357
In stock
NSN: 5331-00-115-1357
FSC Code: 5331
MPN: AS3551136

5331-01-252-7319 (AS3551-126)

NIIN: 01-252-7319
In stock
NSN: 5331-01-252-7319
FSC Code: 5331
MPN: AS3551126

5331-00-846-0504 (AS3551-131)

NIIN: 00-846-0504
In stock
NSN: 5331-00-846-0504
FSC Code: 5331
MPN: AS3551131

5331-01-210-7873 (AS3551-125)

NIIN: 01-210-7873
In stock
NSN: 5331-01-210-7873
FSC Code: 5331
MPN: AS3551125

5331-01-209-3486 (AS3551-138)

NIIN: 01-209-3486
In stock
NSN: 5331-01-209-3486
FSC Code: 5331
MPN: AS3551138

5331-00-701-1768 (AS3551-127)

NIIN: 00-701-1768
In stock
NSN: 5331-00-701-1768
FSC Code: 5331
MPN: AS3551127

5331-00-686-1311 (AS3551-124)

NIIN: 00-686-1311
In stock
NSN: 5331-00-686-1311
FSC Code: 5331
MPN: AS3551124

5331-01-450-0456 (5L99)

NIIN: 01-450-0456
In stock
NSN: 5331-01-450-0456
FSC Code: 5331
MPN: 5L99

5331-00-776-2830 (AS3551-12)

NIIN: 00-776-2830
In stock
NSN: 5331-00-776-2830
FSC Code: 5331
MPN: AS355112

5331-00-677-1238 (AS3551-121)

NIIN: 00-677-1238
In stock
NSN: 5331-00-677-1238
FSC Code: 5331
MPN: AS3551121

5331-00-874-4059 (AS3551-123)

NIIN: 00-874-4059
In stock
NSN: 5331-00-874-4059
FSC Code: 5331
MPN: AS3551123

5331-00-001-4812 (AS3551-10)

NIIN: 00-001-4812
In stock
NSN: 5331-00-001-4812
FSC Code: 5331
MPN: AS355110

5331-00-846-0503 (AS3551-113)

NIIN: 00-846-0503
In stock
NSN: 5331-00-846-0503
FSC Code: 5331
MPN: AS3551113

5331-00-910-6629 (AS3551-110)

NIIN: 00-910-6629
In stock
NSN: 5331-00-910-6629
FSC Code: 5331
MPN: AS3551110

5331-01-325-7401 (AS3551-105)

NIIN: 01-325-7401
In stock
NSN: 5331-01-325-7401
FSC Code: 5331
MPN: AS3551105

5331-01-070-3360 (AS3551-035)

NIIN: 01-070-3360
In stock
NSN: 5331-01-070-3360
FSC Code: 5331
MPN: AS3551035

5331-00-686-1291 (AS3551-041)

NIIN: 00-686-1291
In stock
NSN: 5331-00-686-1291
FSC Code: 5331
MPN: AS3551041

5331-00-234-2221 (AS3551-048)

NIIN: 00-234-2221
In stock
NSN: 5331-00-234-2221
FSC Code: 5331
MPN: AS3551048

5331-00-903-5561 (AS3551-039)

NIIN: 00-903-5561
In stock
NSN: 5331-00-903-5561
FSC Code: 5331
MPN: AS3551039

5331-00-491-1583 (AS3551-049)

NIIN: 00-491-1583
In stock
NSN: 5331-00-491-1583
FSC Code: 5331
MPN: AS3551049

5331-01-419-8336 (5L62)

NIIN: 01-419-8336
In stock
NSN: 5331-01-419-8336
FSC Code: 5331
MPN: 5L62

5331-00-234-2240 (AS3551-047)

NIIN: 00-234-2240
In stock
NSN: 5331-00-234-2240
FSC Code: 5331
MPN: AS3551047

5331-00-045-7959 (AS3551-032)

NIIN: 00-045-7959
In stock
NSN: 5331-00-045-7959
FSC Code: 5331
MPN: AS3551032

5331-00-269-4495 (AS3551-040)

NIIN: 00-269-4495
In stock
NSN: 5331-00-269-4495
FSC Code: 5331
MPN: AS3551040

5331-00-769-5959 (AS3551-04)

NIIN: 00-769-5959
In stock
NSN: 5331-00-769-5959
FSC Code: 5331
MPN: AS355104

5331-00-912-5810 (AS3551-037)

NIIN: 00-912-5810
In stock
NSN: 5331-00-912-5810
FSC Code: 5331
MPN: AS3551037

5331-00-983-0789 (AS3551-031)

NIIN: 00-983-0789
In stock
NSN: 5331-00-983-0789
FSC Code: 5331
MPN: AS3551031

5331-01-473-6234 (5L4759)

NIIN: 01-473-6234
In stock
NSN: 5331-01-473-6234
FSC Code: 5331
MPN: 5L4759

5331-00-686-1290 (AS3551-038)

NIIN: 00-686-1290
In stock
NSN: 5331-00-686-1290
FSC Code: 5331
MPN: AS3551038

5331-00-287-6409 (AS3551-029)

NIIN: 00-287-6409
In stock
NSN: 5331-00-287-6409
FSC Code: 5331
MPN: AS3551029

5331-00-769-5950 (AS3551-03)

NIIN: 00-769-5950
In stock
NSN: 5331-00-769-5950
FSC Code: 5331
MPN: AS355103

5331-00-701-1894 (AS3551-027)

NIIN: 00-701-1894
In stock
NSN: 5331-00-701-1894
FSC Code: 5331
MPN: AS3551027

5331-00-677-1177 (AS3551-028)

NIIN: 00-677-1177
In stock
NSN: 5331-00-677-1177
FSC Code: 5331
MPN: AS3551028

5331-00-924-7760 (AS3551-020)

NIIN: 00-924-7760
In stock
NSN: 5331-00-924-7760
FSC Code: 5331
MPN: AS3551020

5331-00-009-0534 (AS3551-026)

NIIN: 00-009-0534
In stock
NSN: 5331-00-009-0534
FSC Code: 5331
MPN: AS3551026

5331-01-419-8334 (5L12)

NIIN: 01-419-8334
In stock
NSN: 5331-01-419-8334
FSC Code: 5331
MPN: 5L12

5331-00-097-6407 (AS3551-025)

NIIN: 00-097-6407
In stock
NSN: 5331-00-097-6407
FSC Code: 5331
MPN: AS3551025

5331-00-435-0455 (AS3551-004)

NIIN: 00-435-0455
In stock
NSN: 5331-00-435-0455
FSC Code: 5331
MPN: AS3551004

5331-00-903-8264 (AS3551-02)

NIIN: 00-903-8264
In stock
NSN: 5331-00-903-8264
FSC Code: 5331
MPN: AS355102

5331-01-049-2225 (AS33931-8)

NIIN: 01-049-2225
In stock
NSN: 5331-01-049-2225
FSC Code: 5331
MPN: AS339318

5331-00-715-1364 (AS3551-017)

NIIN: 00-715-1364
In stock
NSN: 5331-00-715-1364
FSC Code: 5331
MPN: AS3551017

5331-00-933-5754 (AS3551-009)

NIIN: 00-933-5754
In stock
NSN: 5331-00-933-5754
FSC Code: 5331
MPN: AS3551009

5331-00-524-7535 (AS3551-005)

NIIN: 00-524-7535
In stock
NSN: 5331-00-524-7535
FSC Code: 5331
MPN: AS3551005

5331-00-343-1737 (AS3209-572)

NIIN: 00-343-1737
In stock
NSN: 5331-00-343-1737
FSC Code: 5331
MPN: AS3209572

5331-01-006-2112 (AS3209-469)

NIIN: 01-006-2112
In stock
NSN: 5331-01-006-2112
FSC Code: 5331
MPN: AS3209469

5331-01-006-2117 (AS3209-474)

NIIN: 01-006-2117
In stock
NSN: 5331-01-006-2117
FSC Code: 5331
MPN: AS3209474