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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.

5331-01-378-7201 (4013-32)

NIIN: 01-378-7201
In stock
NSN: 5331-01-378-7201
FSC Code: 5331
MPN: 401332

5331-01-342-2547 (401-18)

NIIN: 01-342-2547
In stock
NSN: 5331-01-342-2547
FSC Code: 5331
MPN: 40118

5331-01-560-2990 (4010-62)

NIIN: 01-560-2990
In stock
NSN: 5331-01-560-2990
FSC Code: 5331
MPN: 401062

5331-01-097-8957 (803-1385721-5-4)

NIIN: 01-097-8957
In stock
NSN: 5331-01-097-8957
FSC Code: 5331
MPN: 803138572154

5331-01-264-7298 (803-1385721-1-4)

NIIN: 01-264-7298
In stock
NSN: 5331-01-264-7298
FSC Code: 5331
MPN: 803138572114

5331-00-100-4717 (803-1385714-8-05)

NIIN: 00-100-4717
In stock
NSN: 5331-00-100-4717
FSC Code: 5331
MPN: 8031385714805

5331-01-266-6745 (803-1385714-7-7)

NIIN: 01-266-6745
In stock
NSN: 5331-01-266-6745
FSC Code: 5331
MPN: 803138571477

5331-01-264-7310 (803-1385714-7-4)

NIIN: 01-264-7310
In stock
NSN: 5331-01-264-7310
FSC Code: 5331
MPN: 803138571474

5331-01-209-2951 (803-1385714-7-04)

NIIN: 01-209-2951
In stock
NSN: 5331-01-209-2951
FSC Code: 5331
MPN: 8031385714704

5331-01-264-7214 (803-1385714-4-7)

NIIN: 01-264-7214
In stock
NSN: 5331-01-264-7214
FSC Code: 5331
MPN: 803138571447

5331-01-264-7213 (803-1385714-3-7)

NIIN: 01-264-7213
In stock
NSN: 5331-01-264-7213
FSC Code: 5331
MPN: 803138571437

5331-01-264-7212 (803-1385714-2-7)

NIIN: 01-264-7212
In stock
NSN: 5331-01-264-7212
FSC Code: 5331
MPN: 803138571427

5331-01-264-7211 (803-1385714-1-7)

NIIN: 01-264-7211
In stock
NSN: 5331-01-264-7211
FSC Code: 5331
MPN: 803138571417

5331-01-290-7411 (803-1385714-1-04)

NIIN: 01-290-7411
In stock
NSN: 5331-01-290-7411
FSC Code: 5331
MPN: 8031385714104

5331-01-408-2013 (7386937ITEM16)

NIIN: 01-408-2013
In stock
NSN: 5331-01-408-2013
FSC Code: 5331
MPN: 7386937ITEM16

5331-01-215-3820 (803-1385623-046X-42)

NIIN: 01-215-3820
In stock
NSN: 5331-01-215-3820
FSC Code: 5331
MPN: 8031385623046X42

5331-01-450-1271 (400A-28)

NIIN: 01-450-1271
In stock
NSN: 5331-01-450-1271
FSC Code: 5331
MPN: 400A28

5331-01-341-6764 (400-6537775)

NIIN: 01-341-6764
In stock
NSN: 5331-01-341-6764
FSC Code: 5331
MPN: 4006537775

5331-01-503-9184 (400635-0044)

NIIN: 01-503-9184
In stock
NSN: 5331-01-503-9184
FSC Code: 5331
MPN: 4006350044

5331-01-287-8651 (802CX364)

NIIN: 01-287-8651
In stock
NSN: 5331-01-287-8651
FSC Code: 5331
MPN: 802CX364

5331-00-983-9257 (8029-71116B)

NIIN: 00-983-9257
In stock
NSN: 5331-00-983-9257
FSC Code: 5331
MPN: 802971116B

5331-00-837-3347 (802-799-5)

NIIN: 00-837-3347
In stock
NSN: 5331-00-837-3347
FSC Code: 5331
MPN: 8027995

5331-01-061-5290 (80278DB)

NIIN: 01-061-5290
In stock
NSN: 5331-01-061-5290
FSC Code: 5331
MPN: 80278DB

5331-00-492-6122 (8-028)

NIIN: 00-492-6122
In stock
NSN: 5331-00-492-6122
FSC Code: 5331
MPN: 8028

5331-00-599-2925 (802-599-5)

NIIN: 00-599-2925
In stock
NSN: 5331-00-599-2925
FSC Code: 5331
MPN: 8025995

5331-00-599-0998 (802-599-10)

NIIN: 00-599-0998
In stock
NSN: 5331-00-599-0998
FSC Code: 5331
MPN: 80259910

5331-00-180-8764 (802404-7)

NIIN: 00-180-8764
In stock
NSN: 5331-00-180-8764
FSC Code: 5331
MPN: 8024047

5331-00-192-0437 (802-299-1-4)

NIIN: 00-192-0437
In stock
NSN: 5331-00-192-0437
FSC Code: 5331
MPN: 80229914

5331-00-139-0125 (802244-7)

NIIN: 00-139-0125
In stock
NSN: 5331-00-139-0125
FSC Code: 5331
MPN: 8022447

5331-00-351-0069 (8021-70116)

NIIN: 00-351-0069
In stock
NSN: 5331-00-351-0069
FSC Code: 5331
MPN: 802170116

5331-00-576-5323 (802-099-4)

NIIN: 00-576-5323
In stock
NSN: 5331-00-576-5323
FSC Code: 5331
MPN: 8020994

5331-01-134-0610 (8020-0035)

NIIN: 01-134-0610
In stock
NSN: 5331-01-134-0610
FSC Code: 5331
MPN: 80200035

5331-00-482-9426 (801-9507)

NIIN: 00-482-9426
In stock
NSN: 5331-00-482-9426
FSC Code: 5331
MPN: 8019507

5331-01-569-3000 (400208-0007)

NIIN: 01-569-3000
In stock
NSN: 5331-01-569-3000
FSC Code: 5331
MPN: 4002080007

5331-00-465-5744 (8017-480E)

NIIN: 00-465-5744
In stock
NSN: 5331-00-465-5744
FSC Code: 5331
MPN: 8017480E

5331-01-569-3001 (400207-0008)

NIIN: 01-569-3001
In stock
NSN: 5331-01-569-3001
FSC Code: 5331
MPN: 4002070008

5331-01-545-8512 (400-165-15)

NIIN: 01-545-8512
In stock
NSN: 5331-01-545-8512
FSC Code: 5331
MPN: 40016515

5331-00-526-9083 (8015-366Y)

NIIN: 00-526-9083
In stock
NSN: 5331-00-526-9083
FSC Code: 5331
MPN: 8015366Y

5331-01-546-3709 (400134-1)

NIIN: 01-546-3709
In stock
NSN: 5331-01-546-3709
FSC Code: 5331
MPN: 4001341

5331-01-546-3590 (400134-2)

NIIN: 01-546-3590
In stock
NSN: 5331-01-546-3590
FSC Code: 5331
MPN: 4001342

5331-01-498-7145 (4001-20)

NIIN: 01-498-7145
In stock
NSN: 5331-01-498-7145
FSC Code: 5331
MPN: 400120

5331-01-498-7141 (4001-16)

NIIN: 01-498-7141
In stock
NSN: 5331-01-498-7141
FSC Code: 5331
MPN: 400116

5331-00-253-2801 (801-25)

NIIN: 00-253-2801
In stock
NSN: 5331-00-253-2801
FSC Code: 5331
MPN: 80125

5331-00-128-2058 (8012-366Y)

NIIN: 00-128-2058
In stock
NSN: 5331-00-128-2058
FSC Code: 5331
MPN: 8012366Y

5331-01-374-1042 (400-10398)

NIIN: 01-374-1042
In stock
NSN: 5331-01-374-1042
FSC Code: 5331
MPN: 40010398

5331-00-249-4358 (8011-65190)

NIIN: 00-249-4358
In stock
NSN: 5331-00-249-4358
FSC Code: 5331
MPN: 801165190

5331-00-983-1346 (801160-4)

NIIN: 00-983-1346
In stock
NSN: 5331-00-983-1346
FSC Code: 5331
MPN: 8011604

5331-00-983-1317 (801160-7)

NIIN: 00-983-1317
In stock
NSN: 5331-00-983-1317
FSC Code: 5331
MPN: 8011607