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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.

5331-01-421-0510 (5-128)

NIIN: 01-421-0510
In stock
NSN: 5331-01-421-0510
FSC Code: 5331
MPN: 5128

5331-01-209-7027 (980-2355)

NIIN: 01-209-7027
In stock
NSN: 5331-01-209-7027
FSC Code: 5331
MPN: 9802355

5331-01-419-8408 (512-6404873-27)

NIIN: 01-419-8408
In stock
NSN: 5331-01-419-8408
FSC Code: 5331
MPN: 512640487327

5331-00-473-5109 (9800-354X1PC31)

NIIN: 00-473-5109
In stock
NSN: 5331-00-473-5109
FSC Code: 5331
MPN: 9800354X1PC31

5331-01-057-3124 (980-0000-857)

NIIN: 01-057-3124
In stock
NSN: 5331-01-057-3124
FSC Code: 5331
MPN: 9800000857

5331-01-356-8330 (51235-1-100)

NIIN: 01-356-8330
In stock
NSN: 5331-01-356-8330
FSC Code: 5331
MPN: 512351100

5331-00-752-9864 (97M71-05PC21)

NIIN: 00-752-9864
In stock
NSN: 5331-00-752-9864
FSC Code: 5331
MPN: 97M7105PC21

5331-01-222-9810 (9-7999-39)

NIIN: 01-222-9810
In stock
NSN: 5331-01-222-9810
FSC Code: 5331
MPN: 9799939

5331-00-522-7387 (9786E114-1)

NIIN: 00-522-7387
In stock
NSN: 5331-00-522-7387
FSC Code: 5331
MPN: 9786E1141

5331-00-915-2277 (977886-7-668)

NIIN: 00-915-2277
In stock
NSN: 5331-00-915-2277
FSC Code: 5331
MPN: 9778867668

5331-00-892-4080 (9778-805R1PC3)

NIIN: 00-892-4080
In stock
NSN: 5331-00-892-4080
FSC Code: 5331
MPN: 9778805R1PC3

5331-01-449-7114 (5-118-B612-70)

NIIN: 01-449-7114
In stock
NSN: 5331-01-449-7114
FSC Code: 5331
MPN: 5118B61270

5331-00-231-7191 (97690-2)

NIIN: 00-231-7191
In stock
NSN: 5331-00-231-7191
FSC Code: 5331
MPN: 976902

5331-01-551-6525 (OR-1-NEOPRENE)

NIIN: 01-551-6525
In stock
NSN: 5331-01-551-6525
FSC Code: 5331
MPN: OR1NEOPRENE

5331-00-801-1609 (9768-201X2PC17)

NIIN: 00-801-1609
In stock
NSN: 5331-00-801-1609
FSC Code: 5331
MPN: 9768201X2PC17

5331-01-149-6227 (976-5)

NIIN: 01-149-6227
In stock
NSN: 5331-01-149-6227
FSC Code: 5331
MPN: 9765

5331-01-205-5621 (975912-1)

NIIN: 01-205-5621
In stock
NSN: 5331-01-205-5621
FSC Code: 5331
MPN: 9759121

5331-01-068-8420 (975-5-16)

NIIN: 01-068-8420
In stock
NSN: 5331-01-068-8420
FSC Code: 5331
MPN: 975516

5331-01-264-0157 (97-5122)

NIIN: 01-264-0157
In stock
NSN: 5331-01-264-0157
FSC Code: 5331
MPN: 975122

5331-00-239-8413 (974-124ALT5)

NIIN: 00-239-8413
In stock
NSN: 5331-00-239-8413
FSC Code: 5331
MPN: 974124ALT5

5331-01-447-4788 (5-1097E515-80)

NIIN: 01-447-4788
In stock
NSN: 5331-01-447-4788
FSC Code: 5331
MPN: 51097E51580

5331-01-498-5292 (5-108-N-60270)

NIIN: 01-498-5292
In stock
NSN: 5331-01-498-5292
FSC Code: 5331
MPN: 5108N60270

5331-01-571-4395 (B0612-705-108)

NIIN: 01-571-4395
In stock
NSN: 5331-01-571-4395
FSC Code: 5331
MPN: B0612705108

5331-00-890-3738 (97255-236PC27)

NIIN: 00-890-3738
In stock
NSN: 5331-00-890-3738
FSC Code: 5331
MPN: 97255236PC27

5331-01-276-8443 (9-723-74-3303)

NIIN: 01-276-8443
In stock
NSN: 5331-01-276-8443
FSC Code: 5331
MPN: 9723743303

5331-00-788-7559 (9-723-47-0001)

NIIN: 00-788-7559
In stock
NSN: 5331-00-788-7559
FSC Code: 5331
MPN: 9723470001

5331-00-054-3671 (972173ABC)

NIIN: 00-054-3671
In stock
NSN: 5331-00-054-3671
FSC Code: 5331
MPN: 972173ABC

5331-01-316-9596 (97202-60)

NIIN: 01-316-9596
In stock
NSN: 5331-01-316-9596
FSC Code: 5331
MPN: 9720260

5331-00-953-0676 (971886-8-668)

NIIN: 00-953-0676
In stock
NSN: 5331-00-953-0676
FSC Code: 5331
MPN: 9718868668

5331-00-475-2700 (971886-1-660)

NIIN: 00-475-2700
In stock
NSN: 5331-00-475-2700
FSC Code: 5331
MPN: 9718861660

5331-00-915-2278 (971886-3-680)

NIIN: 00-915-2278
In stock
NSN: 5331-00-915-2278
FSC Code: 5331
MPN: 9718863680

5331-00-915-2279 (971886-42-680)

NIIN: 00-915-2279
In stock
NSN: 5331-00-915-2279
FSC Code: 5331
MPN: 97188642680

5331-01-292-4013 (971886-136-688)

NIIN: 01-292-4013
In stock
NSN: 5331-01-292-4013
FSC Code: 5331
MPN: 971886136688

5331-00-915-2281 (971886-10-940)

NIIN: 00-915-2281
In stock
NSN: 5331-00-915-2281
FSC Code: 5331
MPN: 97188610940

5331-01-078-4997 (971886-002-680)

NIIN: 01-078-4997
In stock
NSN: 5331-01-078-4997
FSC Code: 5331
MPN: 971886002680

5331-01-292-4012 (971886-104-688)

NIIN: 01-292-4012
In stock
NSN: 5331-01-292-4012
FSC Code: 5331
MPN: 971886104688

5331-00-420-1771 (971886-002-668)

NIIN: 00-420-1771
In stock
NSN: 5331-00-420-1771
FSC Code: 5331
MPN: 971886002668

5331-01-292-7135 (971886-006-699)

NIIN: 01-292-7135
In stock
NSN: 5331-01-292-7135
FSC Code: 5331
MPN: 971886006699

5331-01-565-6361 (510-2-029)

NIIN: 01-565-6361
In stock
NSN: 5331-01-565-6361
FSC Code: 5331
MPN: 5102029

5331-01-507-5447 (5-1017N304-75)

NIIN: 01-507-5447
In stock
NSN: 5331-01-507-5447
FSC Code: 5331
MPN: 51017N30475

5331-01-325-5240 (970P193)

NIIN: 01-325-5240
In stock
NSN: 5331-01-325-5240
FSC Code: 5331
MPN: 970P193

5331-01-245-3837 (9706K14)

NIIN: 01-245-3837
In stock
NSN: 5331-01-245-3837
FSC Code: 5331
MPN: 9706K14

5331-01-569-6104 (5-1010-L1120-70)

NIIN: 01-569-6104
In stock
NSN: 5331-01-569-6104
FSC Code: 5331
MPN: 51010L112070

5331-01-029-6882 (970-300972-1)

NIIN: 01-029-6882
In stock
NSN: 5331-01-029-6882
FSC Code: 5331
MPN: 9703009721

5331-01-561-6006 (510-013)

NIIN: 01-561-6006
In stock
NSN: 5331-01-561-6006
FSC Code: 5331
MPN: 510013

5331-12-316-6829 (51.96501.0415)

NIIN: 12-316-6829
In stock
NSN: 5331-12-316-6829
FSC Code: 5331
MPN: 51965010415

5331-01-310-5186 (968927-4)

NIIN: 01-310-5186
In stock
NSN: 5331-01-310-5186
FSC Code: 5331
MPN: 9689274

5331-01-310-5188 (967944-0)

NIIN: 01-310-5188
In stock
NSN: 5331-01-310-5188
FSC Code: 5331
MPN: 9679440