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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.

5331-01-548-8305 (N1000-70-905)

NIIN: 01-548-8305
In stock
NSN: 5331-01-548-8305
FSC Code: 5331
MPN: N100070905

5331-01-367-2358 (123-906-3)

NIIN: 01-367-2358
In stock
NSN: 5331-01-367-2358
FSC Code: 5331
MPN: 1239063

5331-01-532-6438 (1238526H1)

NIIN: 01-532-6438
In stock
NSN: 5331-01-532-6438
FSC Code: 5331
MPN: 1238526H1

5331-01-410-8459 (1238-0009)

NIIN: 01-410-8459
In stock
NSN: 5331-01-410-8459
FSC Code: 5331
MPN: 12380009

5331-00-202-0868 (37M60)

NIIN: 00-202-0868
In stock
NSN: 5331-00-202-0868
FSC Code: 5331
MPN: 37M60

5331-14-478-7935 (12-37X2/92-7377)

NIIN: 14-478-7935
In stock
NSN: 5331-14-478-7935
FSC Code: 5331
MPN: 1237X2927377

5331-01-474-1948 (123-7605)

NIIN: 01-474-1948
In stock
NSN: 5331-01-474-1948
FSC Code: 5331
MPN: 1237605

5331-01-474-1954 (123-7584)

NIIN: 01-474-1954
In stock
NSN: 5331-01-474-1954
FSC Code: 5331
MPN: 1237584

5331-01-094-9300 (37B201714P128)

NIIN: 01-094-9300
In stock
NSN: 5331-01-094-9300
FSC Code: 5331
MPN: 37B201714P128

5331-01-146-1190 (37B58225S5UA)

NIIN: 01-146-1190
In stock
NSN: 5331-01-146-1190
FSC Code: 5331
MPN: 37B58225S5UA

5331-00-826-4241 (37B201714P111)

NIIN: 00-826-4241
In stock
NSN: 5331-00-826-4241
FSC Code: 5331
MPN: 37B201714P111

5331-00-890-7863 (37B201714P127)

NIIN: 00-890-7863
In stock
NSN: 5331-00-890-7863
FSC Code: 5331
MPN: 37B201714P127

5331-01-429-9514 (12365937-8)

NIIN: 01-429-9514
In stock
NSN: 5331-01-429-9514
FSC Code: 5331
MPN: 123659378

5331-00-759-7078 (37B201714P121)

NIIN: 00-759-7078
In stock
NSN: 5331-00-759-7078
FSC Code: 5331
MPN: 37B201714P121

5331-01-140-8848 (37B201714P129)

NIIN: 01-140-8848
In stock
NSN: 5331-01-140-8848
FSC Code: 5331
MPN: 37B201714P129

5331-00-322-0508 (37B201714P125)

NIIN: 00-322-0508
In stock
NSN: 5331-00-322-0508
FSC Code: 5331
MPN: 37B201714P125

5331-00-763-4577 (37B201714P122)

NIIN: 00-763-4577
In stock
NSN: 5331-00-763-4577
FSC Code: 5331
MPN: 37B201714P122

5331-01-087-3762 (37B201714P113)

NIIN: 01-087-3762
In stock
NSN: 5331-01-087-3762
FSC Code: 5331
MPN: 37B201714P113

5331-00-004-5339 (37B201713P102)

NIIN: 00-004-5339
In stock
NSN: 5331-00-004-5339
FSC Code: 5331
MPN: 37B201713P102

5331-00-856-9392 (37B201713P109)

NIIN: 00-856-9392
In stock
NSN: 5331-00-856-9392
FSC Code: 5331
MPN: 37B201713P109

5331-00-882-5231 (37B201714P104)

NIIN: 00-882-5231
In stock
NSN: 5331-00-882-5231
FSC Code: 5331
MPN: 37B201714P104

5331-00-827-2239 (37B201207P103)

NIIN: 00-827-2239
In stock
NSN: 5331-00-827-2239
FSC Code: 5331
MPN: 37B201207P103

5331-01-087-3764 (37B201713P07)

NIIN: 01-087-3764
In stock
NSN: 5331-01-087-3764
FSC Code: 5331
MPN: 37B201713P07

5331-01-018-9035 (37B201713P101)

NIIN: 01-018-9035
In stock
NSN: 5331-01-018-9035
FSC Code: 5331
MPN: 37B201713P101

5331-00-983-1989 (37B201713P106)

NIIN: 00-983-1989
In stock
NSN: 5331-00-983-1989
FSC Code: 5331
MPN: 37B201713P106

5331-00-833-3263 (37B201207P106)

NIIN: 00-833-3263
In stock
NSN: 5331-00-833-3263
FSC Code: 5331
MPN: 37B201207P106

5331-01-035-9561 (37B201532P105)

NIIN: 01-035-9561
In stock
NSN: 5331-01-035-9561
FSC Code: 5331
MPN: 37B201532P105

5331-00-846-3485 (37B201207P108)

NIIN: 00-846-3485
In stock
NSN: 5331-00-846-3485
FSC Code: 5331
MPN: 37B201207P108

5331-00-958-3089 (37B201207P111)

NIIN: 00-958-3089
In stock
NSN: 5331-00-958-3089
FSC Code: 5331
MPN: 37B201207P111

5331-01-004-4113 (37B201532P103)

NIIN: 01-004-4113
In stock
NSN: 5331-01-004-4113
FSC Code: 5331
MPN: 37B201532P103

5331-00-840-9345 (37B201207P109)

NIIN: 00-840-9345
In stock
NSN: 5331-00-840-9345
FSC Code: 5331
MPN: 37B201207P109

5331-00-806-9533 (37B201207P107)

NIIN: 00-806-9533
In stock
NSN: 5331-00-806-9533
FSC Code: 5331
MPN: 37B201207P107

5331-00-827-2238 (37B201207P101)

NIIN: 00-827-2238
In stock
NSN: 5331-00-827-2238
FSC Code: 5331
MPN: 37B201207P101

5331-00-827-3002 (37B201207P105)

NIIN: 00-827-3002
In stock
NSN: 5331-00-827-3002
FSC Code: 5331
MPN: 37B201207P105

5331-00-827-2240 (37B201207P104)

NIIN: 00-827-2240
In stock
NSN: 5331-00-827-2240
FSC Code: 5331
MPN: 37B201207P104

5331-00-847-1353 (37B102714P102)

NIIN: 00-847-1353
In stock
NSN: 5331-00-847-1353
FSC Code: 5331
MPN: 37B102714P102

5331-01-313-5699 (37A12601)

NIIN: 01-313-5699
In stock
NSN: 5331-01-313-5699
FSC Code: 5331
MPN: 37A12601

5331-00-514-5505 (379-S-5)

NIIN: 00-514-5505
In stock
NSN: 5331-00-514-5505
FSC Code: 5331
MPN: 379S5

5331-00-663-8022 (379S4)

NIIN: 00-663-8022
In stock
NSN: 5331-00-663-8022
FSC Code: 5331
MPN: 379S4

5331-00-963-2050 (379S26)

NIIN: 00-963-2050
In stock
NSN: 5331-00-963-2050
FSC Code: 5331
MPN: 379S26

5331-01-162-8404 (379-S-22)

NIIN: 01-162-8404
In stock
NSN: 5331-01-162-8404
FSC Code: 5331
MPN: 379S22

5331-00-141-7808 (379S24)

NIIN: 00-141-7808
In stock
NSN: 5331-00-141-7808
FSC Code: 5331
MPN: 379S24

5331-00-202-1135 (379S20)

NIIN: 00-202-1135
In stock
NSN: 5331-00-202-1135
FSC Code: 5331
MPN: 379S20

5331-00-599-6343 (379-S-25)

NIIN: 00-599-6343
In stock
NSN: 5331-00-599-6343
FSC Code: 5331
MPN: 379S25

5331-00-202-1133 (379S23)

NIIN: 00-202-1133
In stock
NSN: 5331-00-202-1133
FSC Code: 5331
MPN: 379S23

5331-00-202-1159 (379S21)

NIIN: 00-202-1159
In stock
NSN: 5331-00-202-1159
FSC Code: 5331
MPN: 379S21

5331-00-202-1136 (379S14)

NIIN: 00-202-1136
In stock
NSN: 5331-00-202-1136
FSC Code: 5331
MPN: 379S14

5331-00-291-9289 (379S18)

NIIN: 00-291-9289
In stock
NSN: 5331-00-291-9289
FSC Code: 5331
MPN: 379S18