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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.

5331-00-582-3903 (C41512-5ISSUE3)

NIIN: 00-582-3903
In stock
NSN: 5331-00-582-3903
FSC Code: 5331
MPN: C415125ISSUE3

5331-01-312-7173 (C-4050D-D-16)

NIIN: 01-312-7173
In stock
NSN: 5331-01-312-7173
FSC Code: 5331
MPN: C4050DD16

5331-01-091-7778 (C4007-513-034)

NIIN: 01-091-7778
In stock
NSN: 5331-01-091-7778
FSC Code: 5331
MPN: C4007513034

5331-01-091-7779 (C4008-514-034)

NIIN: 01-091-7779
In stock
NSN: 5331-01-091-7779
FSC Code: 5331
MPN: C4008514034

5331-01-192-2121 (C4)

NIIN: 01-192-2121
In stock
NSN: 5331-01-192-2121
FSC Code: 5331
MPN: C4

5331-01-414-0688 (63597-174C)

NIIN: 01-414-0688
In stock
NSN: 5331-01-414-0688
FSC Code: 5331
MPN: 63597174C

5331-00-505-4039 (C3648SK)

NIIN: 00-505-4039
In stock
NSN: 5331-00-505-4039
FSC Code: 5331
MPN: C3648SK

5331-00-420-1453 (C356019549)

NIIN: 00-420-1453
In stock
NSN: 5331-00-420-1453
FSC Code: 5331
MPN: C356019549

5331-00-020-0250 (C356019548)

NIIN: 00-020-0250
In stock
NSN: 5331-00-020-0250
FSC Code: 5331
MPN: C356019548

5331-00-232-0991 (C356017000)

NIIN: 00-232-0991
In stock
NSN: 5331-00-232-0991
FSC Code: 5331
MPN: C356017000

5331-00-463-5464 (C356007065)

NIIN: 00-463-5464
In stock
NSN: 5331-00-463-5464
FSC Code: 5331
MPN: C356007065

5331-01-544-7038 (6355-0127)

NIIN: 01-544-7038
In stock
NSN: 5331-01-544-7038
FSC Code: 5331
MPN: 63550127

5331-01-387-8843 (14 6350996ITEM14)

NIIN: 01-387-8843
In stock
NSN: 5331-01-387-8843
FSC Code: 5331
MPN: 146350996ITEM14

5331-00-955-9645 (C-3317-229)

NIIN: 00-955-9645
In stock
NSN: 5331-00-955-9645
FSC Code: 5331
MPN: C3317229

5331-00-955-9643 (C-3317-343-1)

NIIN: 00-955-9643
In stock
NSN: 5331-00-955-9643
FSC Code: 5331
MPN: C33173431

5331-01-264-5923 (C321-606)

NIIN: 01-264-5923
In stock
NSN: 5331-01-264-5923
FSC Code: 5331
MPN: C321606

5331-01-362-0690 (K-924-L-1.25IN)

NIIN: 01-362-0690
In stock
NSN: 5331-01-362-0690
FSC Code: 5331
MPN: K924L125IN

5331-01-382-4348 (6-349)

NIIN: 01-382-4348
In stock
NSN: 5331-01-382-4348
FSC Code: 5331
MPN: 6349

5331-01-381-2810 (634733)

NIIN: 01-381-2810
In stock
NSN: 5331-01-381-2810
FSC Code: 5331
MPN: 634733

5331-00-580-5603 (C3186-7)

NIIN: 00-580-5603
In stock
NSN: 5331-00-580-5603
FSC Code: 5331
MPN: C31867

5331-01-283-1586 (C3150)

NIIN: 01-283-1586
In stock
NSN: 5331-01-283-1586
FSC Code: 5331
MPN: C3150

5331-01-283-1585 (C3150)

NIIN: 01-283-1585
In stock
NSN: 5331-01-283-1585
FSC Code: 5331
MPN: C3150

5331-01-283-3546 (C3150)

NIIN: 01-283-3546
In stock
NSN: 5331-01-283-3546
FSC Code: 5331
MPN: C3150

5331-01-375-4310 (633B1955)

NIIN: 01-375-4310
In stock
NSN: 5331-01-375-4310
FSC Code: 5331
MPN: 633B1955

5331-01-377-5167 (633B1819)

NIIN: 01-377-5167
In stock
NSN: 5331-01-377-5167
FSC Code: 5331
MPN: 633B1819

5331-01-380-7389 (633B1834)

NIIN: 01-380-7389
In stock
NSN: 5331-01-380-7389
FSC Code: 5331
MPN: 633B1834

5331-01-283-3549 (C3150)

NIIN: 01-283-3549
In stock
NSN: 5331-01-283-3549
FSC Code: 5331
MPN: C3150

5331-01-461-8475 (633B3385)

NIIN: 01-461-8475
In stock
NSN: 5331-01-461-8475
FSC Code: 5331
MPN: 633B3385

5331-01-377-2660 (633B1814)

NIIN: 01-377-2660
In stock
NSN: 5331-01-377-2660
FSC Code: 5331
MPN: 633B1814

5331-01-458-6667 (633B1813)

NIIN: 01-458-6667
In stock
NSN: 5331-01-458-6667
FSC Code: 5331
MPN: 633B1813

5331-01-375-4311 (633B1953)

NIIN: 01-375-4311
In stock
NSN: 5331-01-375-4311
FSC Code: 5331
MPN: 633B1953

5331-01-524-4676 (633B1521)

NIIN: 01-524-4676
In stock
NSN: 5331-01-524-4676
FSC Code: 5331
MPN: 633B1521

5331-01-283-3548 (C3150)

NIIN: 01-283-3548
In stock
NSN: 5331-01-283-3548
FSC Code: 5331
MPN: C3150

5331-01-377-2663 (633B1817)

NIIN: 01-377-2663
In stock
NSN: 5331-01-377-2663
FSC Code: 5331
MPN: 633B1817

5331-01-375-4306 (633B1956)

NIIN: 01-375-4306
In stock
NSN: 5331-01-375-4306
FSC Code: 5331
MPN: 633B1956

5331-01-377-2662 (633B1811)

NIIN: 01-377-2662
In stock
NSN: 5331-01-377-2662
FSC Code: 5331
MPN: 633B1811

5331-01-377-5340 (633B1808)

NIIN: 01-377-5340
In stock
NSN: 5331-01-377-5340
FSC Code: 5331
MPN: 633B1808

5331-01-375-4307 (633B1461)

NIIN: 01-375-4307
In stock
NSN: 5331-01-375-4307
FSC Code: 5331
MPN: 633B1461

5331-01-375-4305 (633B1465)

NIIN: 01-375-4305
In stock
NSN: 5331-01-375-4305
FSC Code: 5331
MPN: 633B1465

5331-01-377-5367 (633B1816)

NIIN: 01-377-5367
In stock
NSN: 5331-01-377-5367
FSC Code: 5331
MPN: 633B1816

5331-01-377-2789 (633B1818)

NIIN: 01-377-2789
In stock
NSN: 5331-01-377-2789
FSC Code: 5331
MPN: 633B1818

5331-01-375-4297 (633B1467)

NIIN: 01-375-4297
In stock
NSN: 5331-01-375-4297
FSC Code: 5331
MPN: 633B1467

5331-01-377-5168 (633B1809)

NIIN: 01-377-5168
In stock
NSN: 5331-01-377-5168
FSC Code: 5331
MPN: 633B1809

5331-01-375-4308 (633B1428)

NIIN: 01-375-4308
In stock
NSN: 5331-01-375-4308
FSC Code: 5331
MPN: 633B1428

5331-01-381-0702 (633B1301)

NIIN: 01-381-0702
In stock
NSN: 5331-01-381-0702
FSC Code: 5331
MPN: 633B1301

5331-01-381-0742 (633B1191)

NIIN: 01-381-0742
In stock
NSN: 5331-01-381-0742
FSC Code: 5331
MPN: 633B1191

5331-01-375-4294 (633B1440)

NIIN: 01-375-4294
In stock
NSN: 5331-01-375-4294
FSC Code: 5331
MPN: 633B1440

5331-01-375-4292 (633B1441)

NIIN: 01-375-4292
In stock
NSN: 5331-01-375-4292
FSC Code: 5331
MPN: 633B1441