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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.

5331-00-292-3324 (379-S-13)

NIIN: 00-292-3324
In stock
NSN: 5331-00-292-3324
FSC Code: 5331
MPN: 379S13

5331-00-599-0089 (379S17)

NIIN: 00-599-0089
In stock
NSN: 5331-00-599-0089
FSC Code: 5331
MPN: 379S17

5331-00-641-1074 (379S131)

NIIN: 00-641-1074
In stock
NSN: 5331-00-641-1074
FSC Code: 5331
MPN: 379S131

5331-00-527-6023 (379S149)

NIIN: 00-527-6023
In stock
NSN: 5331-00-527-6023
FSC Code: 5331
MPN: 379S149

5331-00-599-9124 (379S125)

NIIN: 00-599-9124
In stock
NSN: 5331-00-599-9124
FSC Code: 5331
MPN: 379S125

5331-00-171-5336 (379S127)

NIIN: 00-171-5336
In stock
NSN: 5331-00-171-5336
FSC Code: 5331
MPN: 379S127

5331-00-351-4286 (379275-S94)

NIIN: 00-351-4286
In stock
NSN: 5331-00-351-4286
FSC Code: 5331
MPN: 379275S94

5331-00-351-4288 (379313-S91)

NIIN: 00-351-4288
In stock
NSN: 5331-00-351-4288
FSC Code: 5331
MPN: 379313S91

5331-01-228-6165 (3791-8)

NIIN: 01-228-6165
In stock
NSN: 5331-01-228-6165
FSC Code: 5331
MPN: 37918

5331-01-363-8570 (N-999-65GC-A-001)

NIIN: 01-363-8570
In stock
NSN: 5331-01-363-8570
FSC Code: 5331
MPN: N99965GCA001

5331-01-310-3893 (3-7877/5140/0)

NIIN: 01-310-3893
In stock
NSN: 5331-01-310-3893
FSC Code: 5331
MPN: 3787751400

5331-01-386-0580 (12346490-7)

NIIN: 01-386-0580
In stock
NSN: 5331-01-386-0580
FSC Code: 5331
MPN: 123464907

5331-01-359-9344 (12346490-5)

NIIN: 01-359-9344
In stock
NSN: 5331-01-359-9344
FSC Code: 5331
MPN: 123464905

5331-01-460-3886 (12346490-9)

NIIN: 01-460-3886
In stock
NSN: 5331-01-460-3886
FSC Code: 5331
MPN: 123464909

5331-01-386-0173 (12346490-8)

NIIN: 01-386-0173
In stock
NSN: 5331-01-386-0173
FSC Code: 5331
MPN: 123464908

5331-01-357-1560 (12346490-6)

NIIN: 01-357-1560
In stock
NSN: 5331-01-357-1560
FSC Code: 5331
MPN: 123464906

5331-01-354-5789 (12346490-4)

NIIN: 01-354-5789
In stock
NSN: 5331-01-354-5789
FSC Code: 5331
MPN: 123464904

5331-01-342-3702 (4645243-0026)

NIIN: 01-342-3702
In stock
NSN: 5331-01-342-3702
FSC Code: 5331
MPN: 46452430026

5331-01-355-6397 (12346490-3)

NIIN: 01-355-6397
In stock
NSN: 5331-01-355-6397
FSC Code: 5331
MPN: 123464903

5331-01-190-1836 (3780-Q-225)

NIIN: 01-190-1836
In stock
NSN: 5331-01-190-1836
FSC Code: 5331
MPN: 3780Q225

5331-01-281-3406 (3780-V-386)

NIIN: 01-281-3406
In stock
NSN: 5331-01-281-3406
FSC Code: 5331
MPN: 3780V386

5331-01-292-9575 (3780-Q-381)

NIIN: 01-292-9575
In stock
NSN: 5331-01-292-9575
FSC Code: 5331
MPN: 3780Q381

5331-00-143-8614 (3780A183)

NIIN: 00-143-8614
In stock
NSN: 5331-00-143-8614
FSC Code: 5331
MPN: 3780A183

5331-01-255-3560 (3780-T-384)

NIIN: 01-255-3560
In stock
NSN: 5331-01-255-3560
FSC Code: 5331
MPN: 3780T384

5331-01-213-9814 (3780-A-209)

NIIN: 01-213-9814
In stock
NSN: 5331-01-213-9814
FSC Code: 5331
MPN: 3780A209

5331-01-253-2922 (3780A131)

NIIN: 01-253-2922
In stock
NSN: 5331-01-253-2922
FSC Code: 5331
MPN: 3780A131

5331-01-507-7482 (123-30119)

NIIN: 01-507-7482
In stock
NSN: 5331-01-507-7482
FSC Code: 5331
MPN: 12330119

5331-01-508-9288 (123-30039)

NIIN: 01-508-9288
In stock
NSN: 5331-01-508-9288
FSC Code: 5331
MPN: 12330039

5331-00-192-0389 (376769R1)

NIIN: 00-192-0389
In stock
NSN: 5331-00-192-0389
FSC Code: 5331
MPN: 376769R1

5331-01-569-7156 (123-263-5)

NIIN: 01-569-7156
In stock
NSN: 5331-01-569-7156
FSC Code: 5331
MPN: 1232635

5331-01-508-9363 (123-245-5)

NIIN: 01-508-9363
In stock
NSN: 5331-01-508-9363
FSC Code: 5331
MPN: 1232455

5331-01-524-2250 (123-239-5)

NIIN: 01-524-2250
In stock
NSN: 5331-01-524-2250
FSC Code: 5331
MPN: 1232395

5331-01-537-2994 (123-228-5)

NIIN: 01-537-2994
In stock
NSN: 5331-01-537-2994
FSC Code: 5331
MPN: 1232285

5331-01-536-2371 (123-210-5)

NIIN: 01-536-2371
In stock
NSN: 5331-01-536-2371
FSC Code: 5331
MPN: 1232105

5331-01-469-7030 (123-2049)

NIIN: 01-469-7030
In stock
NSN: 5331-01-469-7030
FSC Code: 5331
MPN: 1232049

5331-01-536-0614 (123-209-5)

NIIN: 01-536-0614
In stock
NSN: 5331-01-536-0614
FSC Code: 5331
MPN: 1232095

5331-01-367-2357 (123-213-5)

NIIN: 01-367-2357
In stock
NSN: 5331-01-367-2357
FSC Code: 5331
MPN: 1232135

5331-01-516-2259 (123-2003)

NIIN: 01-516-2259
In stock
NSN: 5331-01-516-2259
FSC Code: 5331
MPN: 1232003

5331-01-475-7810 (123157-373)

NIIN: 01-475-7810
In stock
NSN: 5331-01-475-7810
FSC Code: 5331
MPN: 123157373

5331-01-377-5351 (123157-008)

NIIN: 01-377-5351
In stock
NSN: 5331-01-377-5351
FSC Code: 5331
MPN: 123157008

5331-01-307-4241 (376590X)

NIIN: 01-307-4241
In stock
NSN: 5331-01-307-4241
FSC Code: 5331
MPN: 376590X

5331-01-536-1422 (123-153-5)

NIIN: 01-536-1422
In stock
NSN: 5331-01-536-1422
FSC Code: 5331
MPN: 1231535

5331-01-536-1424 (123-135-5)

NIIN: 01-536-1424
In stock
NSN: 5331-01-536-1424
FSC Code: 5331
MPN: 1231355

5331-01-571-9592 (B8505ITEM2OXYGENCLEANCP)

NIIN: 01-571-9592
In stock
NSN: 5331-01-571-9592
FSC Code: 5331
MPN: B8505ITEM2OXYGENCLEANCP

5331-01-367-1440 (123-111-4)

NIIN: 01-367-1440
In stock
NSN: 5331-01-367-1440
FSC Code: 5331
MPN: 1231114

5331-01-571-9598 (B8504ITEM1)

NIIN: 01-571-9598
In stock
NSN: 5331-01-571-9598
FSC Code: 5331
MPN: B8504ITEM1

5331-01-536-1466 (123-042-5-90)

NIIN: 01-536-1466
In stock
NSN: 5331-01-536-1466
FSC Code: 5331
MPN: 123042590

5331-01-483-5943 (123-0319)

NIIN: 01-483-5943
In stock
NSN: 5331-01-483-5943
FSC Code: 5331
MPN: 1230319