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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.

5331-01-373-4788 (A8241-063-82340-278)

NIIN: 01-373-4788
In stock
NSN: 5331-01-373-4788
FSC Code: 5331
MPN: A824106382340278

5331-01-373-4785 (A8241-063-82340-260)

NIIN: 01-373-4785
In stock
NSN: 5331-01-373-4785
FSC Code: 5331
MPN: A824106382340260

5331-01-373-4784 (A8241-063-82340-171)

NIIN: 01-373-4784
In stock
NSN: 5331-01-373-4784
FSC Code: 5331
MPN: A824106382340171

5331-01-373-4786 (A8241-063-82340-265)

NIIN: 01-373-4786
In stock
NSN: 5331-01-373-4786
FSC Code: 5331
MPN: A824106382340265

5331-00-686-1315 (MS9241-222)

NIIN: 00-686-1315
In stock
NSN: 5331-00-686-1315
FSC Code: 5331
MPN: MS9241222

5331-01-474-4271 (TH103950)

NIIN: 01-474-4271
In stock
NSN: 5331-01-474-4271
FSC Code: 5331
MPN: TH103950

5331-01-474-4249 (TH101014)

NIIN: 01-474-4249
In stock
NSN: 5331-01-474-4249
FSC Code: 5331
MPN: TH101014

5331-01-475-3888 (A811045)

NIIN: 01-475-3888
In stock
NSN: 5331-01-475-3888
FSC Code: 5331
MPN: A811045

5331-01-475-3882 (TH101300)

NIIN: 01-475-3882
In stock
NSN: 5331-01-475-3882
FSC Code: 5331
MPN: TH101300

5331-01-375-2833 (A-8028-A)

NIIN: 01-375-2833
In stock
NSN: 5331-01-375-2833
FSC Code: 5331
MPN: A8028A

5331-01-340-9088 (A80403-506)

NIIN: 01-340-9088
In stock
NSN: 5331-01-340-9088
FSC Code: 5331
MPN: A80403506

5331-01-379-9104 (A80403-500)

NIIN: 01-379-9104
In stock
NSN: 5331-01-379-9104
FSC Code: 5331
MPN: A80403500

5331-01-375-2834 (A-8028-A)

NIIN: 01-375-2834
In stock
NSN: 5331-01-375-2834
FSC Code: 5331
MPN: A8028A

5331-01-375-2832 (A-8028-A)

NIIN: 01-375-2832
In stock
NSN: 5331-01-375-2832
FSC Code: 5331
MPN: A8028A

5331-01-360-5924 (A79291-2)

NIIN: 01-360-5924
In stock
NSN: 5331-01-360-5924
FSC Code: 5331
MPN: A792912

5331-01-086-7887 (MS9068-426)

NIIN: 01-086-7887
In stock
NSN: 5331-01-086-7887
FSC Code: 5331
MPN: MS9068426

5331-01-053-1009 (MS9068-153)

NIIN: 01-053-1009
In stock
NSN: 5331-01-053-1009
FSC Code: 5331
MPN: MS9068153

5331-01-065-9261 (MS9068-128)

NIIN: 01-065-9261
In stock
NSN: 5331-01-065-9261
FSC Code: 5331
MPN: MS9068128

5331-01-360-7888 (A78045-107)

NIIN: 01-360-7888
In stock
NSN: 5331-01-360-7888
FSC Code: 5331
MPN: A78045107

5331-01-360-1902 (SAE-AS83461/1)

NIIN: 01-360-1902
In stock
NSN: 5331-01-360-1902
FSC Code: 5331
MPN: SAEAS834611

5331-00-805-6613 (MS9021PC134)

NIIN: 00-805-6613
In stock
NSN: 5331-00-805-6613
FSC Code: 5331
MPN: MS9021PC134

5331-01-097-8047 (MS9021-329)

NIIN: 01-097-8047
In stock
NSN: 5331-01-097-8047
FSC Code: 5331
MPN: MS9021329

5331-00-044-2395 (MS90064-10)

NIIN: 00-044-2395
In stock
NSN: 5331-00-044-2395
FSC Code: 5331
MPN: MS9006410

5331-01-252-9204 (MS51329-4)

NIIN: 01-252-9204
In stock
NSN: 5331-01-252-9204
FSC Code: 5331
MPN: MS513294

5331-01-378-8578 (A71643-5)

NIIN: 01-378-8578
In stock
NSN: 5331-01-378-8578
FSC Code: 5331
MPN: A716435

5331-01-381-2997 (A71643-1)

NIIN: 01-381-2997
In stock
NSN: 5331-01-381-2997
FSC Code: 5331
MPN: A716431

5331-01-181-4954 (MS43345)

NIIN: 01-181-4954
In stock
NSN: 5331-01-181-4954
FSC Code: 5331
MPN: MS43345

5331-00-977-7539 (MS4291-2)

NIIN: 00-977-7539
In stock
NSN: 5331-00-977-7539
FSC Code: 5331
MPN: MS42912

5331-01-382-2610 (A-702179)

NIIN: 01-382-2610
In stock
NSN: 5331-01-382-2610
FSC Code: 5331
MPN: A702179

5331-01-376-9896 (A6689.220.366CP)

NIIN: 01-376-9896
In stock
NSN: 5331-01-376-9896
FSC Code: 5331
MPN: A6689220366CP

5331-01-367-6592 (A6689.232.142)

NIIN: 01-367-6592
In stock
NSN: 5331-01-367-6592
FSC Code: 5331
MPN: A6689232142

5331-01-386-7209 (A6486.037.175)

NIIN: 01-386-7209
In stock
NSN: 5331-01-386-7209
FSC Code: 5331
MPN: A6486037175

5331-01-566-2147 (A64276-541)

NIIN: 01-566-2147
In stock
NSN: 5331-01-566-2147
FSC Code: 5331
MPN: A64276541

5331-01-435-9483 (A6389994)

NIIN: 01-435-9483
In stock
NSN: 5331-01-435-9483
FSC Code: 5331
MPN: A6389994

5331-01-537-6241 (A63501-207)

NIIN: 01-537-6241
In stock
NSN: 5331-01-537-6241
FSC Code: 5331
MPN: A63501207

5331-01-436-7652 (A-631-12505-15)

NIIN: 01-436-7652
In stock
NSN: 5331-01-436-7652
FSC Code: 5331
MPN: A6311250515

5331-01-436-7651 (A-631-12505-5)

NIIN: 01-436-7651
In stock
NSN: 5331-01-436-7651
FSC Code: 5331
MPN: A631125055

5331-01-548-1695 (A60W1174D038)

NIIN: 01-548-1695
In stock
NSN: 5331-01-548-1695
FSC Code: 5331
MPN: A60W1174D038

5331-01-548-1697 (A60W1174D010)

NIIN: 01-548-1697
In stock
NSN: 5331-01-548-1697
FSC Code: 5331
MPN: A60W1174D010

5331-01-548-1700 (A60W1174D008)

NIIN: 01-548-1700
In stock
NSN: 5331-01-548-1700
FSC Code: 5331
MPN: A60W1174D008

5331-01-548-1704 (A60W1174D007)

NIIN: 01-548-1704
In stock
NSN: 5331-01-548-1704
FSC Code: 5331
MPN: A60W1174D007

5331-00-004-1512 (MS29561-453)

NIIN: 00-004-1512
In stock
NSN: 5331-00-004-1512
FSC Code: 5331
MPN: MS29561453

5331-00-975-2117 (MS29561-442)

NIIN: 00-975-2117
In stock
NSN: 5331-00-975-2117
FSC Code: 5331
MPN: MS29561442

5331-01-077-0206 (MS29561-445)

NIIN: 01-077-0206
In stock
NSN: 5331-01-077-0206
FSC Code: 5331
MPN: MS29561445

5331-00-003-9334 (MS29561-451)

NIIN: 00-003-9334
In stock
NSN: 5331-00-003-9334
FSC Code: 5331
MPN: MS29561451

5331-01-323-8983 (MS29561-447)

NIIN: 01-323-8983
In stock
NSN: 5331-01-323-8983
FSC Code: 5331
MPN: MS29561447

5331-01-032-6494 (MS29561-443)

NIIN: 01-032-6494
In stock
NSN: 5331-01-032-6494
FSC Code: 5331
MPN: MS29561443

5331-00-004-7173 (MS29561-460)

NIIN: 00-004-7173
In stock
NSN: 5331-00-004-7173
FSC Code: 5331
MPN: MS29561460