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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.

5331-01-083-1618 (AS3581-204)

NIIN: 01-083-1618
In stock
NSN: 5331-01-083-1618
FSC Code: 5331
MPN: AS3581204

5331-00-166-1077 (AS3581-004)

NIIN: 00-166-1077
In stock
NSN: 5331-00-166-1077
FSC Code: 5331
MPN: AS3581004

5331-00-803-5898 (AS3578-909)

NIIN: 00-803-5898
In stock
NSN: 5331-00-803-5898
FSC Code: 5331
MPN: AS3578909

5331-01-163-7776 (AS3578-375)

NIIN: 01-163-7776
In stock
NSN: 5331-01-163-7776
FSC Code: 5331
MPN: AS3578375

5331-01-006-5477 (AS3581-041)

NIIN: 01-006-5477
In stock
NSN: 5331-01-006-5477
FSC Code: 5331
MPN: AS3581041

5331-00-585-0397 (AS3578-340)

NIIN: 00-585-0397
In stock
NSN: 5331-00-585-0397
FSC Code: 5331
MPN: AS3578340

5331-01-028-9351 (AS3578-914)

NIIN: 01-028-9351
In stock
NSN: 5331-01-028-9351
FSC Code: 5331
MPN: AS3578914

5331-01-306-4879 (AS3578-386)

NIIN: 01-306-4879
In stock
NSN: 5331-01-306-4879
FSC Code: 5331
MPN: AS3578386

5331-01-086-7425 (AS3578-343)

NIIN: 01-086-7425
In stock
NSN: 5331-01-086-7425
FSC Code: 5331
MPN: AS3578343

5331-01-128-5186 (AS3578-362)

NIIN: 01-128-5186
In stock
NSN: 5331-01-128-5186
FSC Code: 5331
MPN: AS3578362

5331-00-080-0708 (AS3578-273)

NIIN: 00-080-0708
In stock
NSN: 5331-00-080-0708
FSC Code: 5331
MPN: AS3578273

5331-01-127-8066 (AS3578-177)

NIIN: 01-127-8066
In stock
NSN: 5331-01-127-8066
FSC Code: 5331
MPN: AS3578177

5331-00-903-1505 (AS3578-253)

NIIN: 00-903-1505
In stock
NSN: 5331-00-903-1505
FSC Code: 5331
MPN: AS3578253

5331-01-192-9320 (AS3578-331)

NIIN: 01-192-9320
In stock
NSN: 5331-01-192-9320
FSC Code: 5331
MPN: AS3578331

5331-00-883-1465 (AS3578-149)

NIIN: 00-883-1465
In stock
NSN: 5331-00-883-1465
FSC Code: 5331
MPN: AS3578149

5331-01-088-2843 (AS3578-173)

NIIN: 01-088-2843
In stock
NSN: 5331-01-088-2843
FSC Code: 5331
MPN: AS3578173

5331-00-801-8753 (AS3578-26)

NIIN: 00-801-8753
In stock
NSN: 5331-00-801-8753
FSC Code: 5331
MPN: AS357826

5331-00-585-3218 (AS3578-120)

NIIN: 00-585-3218
In stock
NSN: 5331-00-585-3218
FSC Code: 5331
MPN: AS3578120

5331-01-284-1003 (AS3578-211)

NIIN: 01-284-1003
In stock
NSN: 5331-01-284-1003
FSC Code: 5331
MPN: AS3578211

5331-00-401-5413 (AS3551-437)

NIIN: 00-401-5413
In stock
NSN: 5331-00-401-5413
FSC Code: 5331
MPN: AS3551437

5331-00-003-0618 (AS3551-909)

NIIN: 00-003-0618
In stock
NSN: 5331-00-003-0618
FSC Code: 5331
MPN: AS3551909

5331-00-701-1790 (AS3551-905)

NIIN: 00-701-1790
In stock
NSN: 5331-00-701-1790
FSC Code: 5331
MPN: AS3551905

5331-00-090-0818 (AS3551-908)

NIIN: 00-090-0818
In stock
NSN: 5331-00-090-0818
FSC Code: 5331
MPN: AS3551908

5331-00-152-6340 (AS3551-386)

NIIN: 00-152-6340
In stock
NSN: 5331-00-152-6340
FSC Code: 5331
MPN: AS3551386

5331-00-245-9205 (AS3551-384)

NIIN: 00-245-9205
In stock
NSN: 5331-00-245-9205
FSC Code: 5331
MPN: AS3551384

5331-01-082-8729 (AS3551-366)

NIIN: 01-082-8729
In stock
NSN: 5331-01-082-8729
FSC Code: 5331
MPN: AS3551366

5331-00-021-3788 (AS3551-382)

NIIN: 00-021-3788
In stock
NSN: 5331-00-021-3788
FSC Code: 5331
MPN: AS3551382

5331-00-945-4452 (AS3551-349)

NIIN: 00-945-4452
In stock
NSN: 5331-00-945-4452
FSC Code: 5331
MPN: AS3551349

5331-00-245-9204 (AS3551-368)

NIIN: 00-245-9204
In stock
NSN: 5331-00-245-9204
FSC Code: 5331
MPN: AS3551368

5331-00-953-3834 (AS3551-28)

NIIN: 00-953-3834
In stock
NSN: 5331-00-953-3834
FSC Code: 5331
MPN: AS355128

5331-00-001-4813 (AS3551-358)

NIIN: 00-001-4813
In stock
NSN: 5331-00-001-4813
FSC Code: 5331
MPN: AS3551358

5331-00-420-0618 (AS3551-381)

NIIN: 00-420-0618
In stock
NSN: 5331-00-420-0618
FSC Code: 5331
MPN: AS3551381

5331-00-181-9693 (AS3551-329)

NIIN: 00-181-9693
In stock
NSN: 5331-00-181-9693
FSC Code: 5331
MPN: AS3551329

5331-01-199-2117 (AS3551-323)

NIIN: 01-199-2117
In stock
NSN: 5331-01-199-2117
FSC Code: 5331
MPN: AS3551323

5331-00-701-1823 (AS3551-326)

NIIN: 00-701-1823
In stock
NSN: 5331-00-701-1823
FSC Code: 5331
MPN: AS3551326

5331-00-914-8723 (AS3551-275)

NIIN: 00-914-8723
In stock
NSN: 5331-00-914-8723
FSC Code: 5331
MPN: AS3551275

5331-00-068-3919 (AS3551-269)

NIIN: 00-068-3919
In stock
NSN: 5331-00-068-3919
FSC Code: 5331
MPN: AS3551269

5331-01-209-2841 (AS3551-259)

NIIN: 01-209-2841
In stock
NSN: 5331-01-209-2841
FSC Code: 5331
MPN: AS3551259

5331-00-914-8722 (AS3551-258)

NIIN: 00-914-8722
In stock
NSN: 5331-00-914-8722
FSC Code: 5331
MPN: AS3551258

5331-00-952-0105 (AS3551-273)

NIIN: 00-952-0105
In stock
NSN: 5331-00-952-0105
FSC Code: 5331
MPN: AS3551273

5331-01-225-4770 (AS3551-265)

NIIN: 01-225-4770
In stock
NSN: 5331-01-225-4770
FSC Code: 5331
MPN: AS3551265

5331-00-057-3730 (AS3551-272)

NIIN: 00-057-3730
In stock
NSN: 5331-00-057-3730
FSC Code: 5331
MPN: AS3551272

5331-00-845-4962 (AS3551-266)

NIIN: 00-845-4962
In stock
NSN: 5331-00-845-4962
FSC Code: 5331
MPN: AS3551266

5331-01-209-9767 (AS3551-260)

NIIN: 01-209-9767
In stock
NSN: 5331-01-209-9767
FSC Code: 5331
MPN: AS3551260

5331-00-067-9995 (AS3551-264)

NIIN: 00-067-9995
In stock
NSN: 5331-00-067-9995
FSC Code: 5331
MPN: AS3551264

5331-00-949-9080 (AS3551-257)

NIIN: 00-949-9080
In stock
NSN: 5331-00-949-9080
FSC Code: 5331
MPN: AS3551257

5331-00-062-0570 (AS3551-261)

NIIN: 00-062-0570
In stock
NSN: 5331-00-062-0570
FSC Code: 5331
MPN: AS3551261

5331-00-953-3830 (AS3551-251)

NIIN: 00-953-3830
In stock
NSN: 5331-00-953-3830
FSC Code: 5331
MPN: AS3551251