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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.

5331-01-452-0025 (Y316-16)

NIIN: 01-452-0025
In stock
NSN: 5331-01-452-0025
FSC Code: 5331
MPN: Y31616

5331-01-550-0013 (Y327-162)

NIIN: 01-550-0013
In stock
NSN: 5331-01-550-0013
FSC Code: 5331
MPN: Y327162

5331-01-457-6228 (Y325-137)

NIIN: 01-457-6228
In stock
NSN: 5331-01-457-6228
FSC Code: 5331
MPN: Y325137

5331-99-923-0795 (Y27637)

NIIN: 99-923-0795
In stock
NSN: 5331-99-923-0795
FSC Code: 5331
MPN: Y27637

5331-01-377-5209 (Y-187S64X2A)

NIIN: 01-377-5209
In stock
NSN: 5331-01-377-5209
FSC Code: 5331
MPN: Y187S64X2A

5331-01-486-3125 (XX6300124)

NIIN: 01-486-3125
In stock
NSN: 5331-01-486-3125
FSC Code: 5331
MPN: XX6300124

5331-01-443-8118 (XX45-047-10)

NIIN: 01-443-8118
In stock
NSN: 5331-01-443-8118
FSC Code: 5331
MPN: XX4504710

5331-01-432-9170 (XM39000)

NIIN: 01-432-9170
In stock
NSN: 5331-01-432-9170
FSC Code: 5331
MPN: XM39000

5331-01-457-7949 (XM-2782-C)

NIIN: 01-457-7949
In stock
NSN: 5331-01-457-7949
FSC Code: 5331
MPN: XM2782C

5331-01-451-0445 (XL1-20)

NIIN: 01-451-0445
In stock
NSN: 5331-01-451-0445
FSC Code: 5331
MPN: XL120

5331-01-451-0538 (XL1-013)

NIIN: 01-451-0538
In stock
NSN: 5331-01-451-0538
FSC Code: 5331
MPN: XL1013

5331-01-490-3547 (XC3Z9229-AA)

NIIN: 01-490-3547
In stock
NSN: 5331-01-490-3547
FSC Code: 5331
MPN: XC3Z9229AA

5331-01-353-6747 (XM2080M)

NIIN: 01-353-6747
In stock
NSN: 5331-01-353-6747
FSC Code: 5331
MPN: XM2080M

5331-01-499-0578 (X91610)

NIIN: 01-499-0578
In stock
NSN: 5331-01-499-0578
FSC Code: 5331
MPN: X91610

5331-01-499-1023 (X9080240360)

NIIN: 01-499-1023
In stock
NSN: 5331-01-499-1023
FSC Code: 5331
MPN: X9080240360

5331-01-365-0281 (X-50910)

NIIN: 01-365-0281
In stock
NSN: 5331-01-365-0281
FSC Code: 5331
MPN: X50910

5331-01-426-0054 (X44A)

NIIN: 01-426-0054
In stock
NSN: 5331-01-426-0054
FSC Code: 5331
MPN: X44A

5331-01-426-0055 (X44A)

NIIN: 01-426-0055
In stock
NSN: 5331-01-426-0055
FSC Code: 5331
MPN: X44A

5331-01-566-2245 (X4020-264A)

NIIN: 01-566-2245
In stock
NSN: 5331-01-566-2245
FSC Code: 5331
MPN: X4020264A

5331-01-544-0555 (X1950)

NIIN: 01-544-0555
In stock
NSN: 5331-01-544-0555
FSC Code: 5331
MPN: X1950

5331-01-498-4577 (X10303)

NIIN: 01-498-4577
In stock
NSN: 5331-01-498-4577
FSC Code: 5331
MPN: X10303

5331-01-498-4030 (X0932490090)

NIIN: 01-498-4030
In stock
NSN: 5331-01-498-4030
FSC Code: 5331
MPN: X0932490090

5331-01-437-0540 (X07809)

NIIN: 01-437-0540
In stock
NSN: 5331-01-437-0540
FSC Code: 5331
MPN: X07809

5331-01-529-2197 (X0580121073)

NIIN: 01-529-2197
In stock
NSN: 5331-01-529-2197
FSC Code: 5331
MPN: X0580121073

5331-01-448-5267 (X06173)

NIIN: 01-448-5267
In stock
NSN: 5331-01-448-5267
FSC Code: 5331
MPN: X06173

5331-01-474-6214 (X0145CE)

NIIN: 01-474-6214
In stock
NSN: 5331-01-474-6214
FSC Code: 5331
MPN: X0145CE

5331-01-474-6218 (X0145CM)

NIIN: 01-474-6218
In stock
NSN: 5331-01-474-6218
FSC Code: 5331
MPN: X0145CM

5331-01-424-3487 (X0144MM)

NIIN: 01-424-3487
In stock
NSN: 5331-01-424-3487
FSC Code: 5331
MPN: X0144MM

5331-01-474-6217 (X0145CC)

NIIN: 01-474-6217
In stock
NSN: 5331-01-474-6217
FSC Code: 5331
MPN: X0145CC

5331-17-110-4189 (WVTB-ISOLEX)

NIIN: 17-110-4189
In stock
NSN: 5331-17-110-4189
FSC Code: 5331
MPN: WVTBISOLEX

5331-17-110-4197 (WVTB-NOVA)

NIIN: 17-110-4197
In stock
NSN: 5331-17-110-4197
FSC Code: 5331
MPN: WVTBNOVA

5331-01-425-3034 (WVTB-70-1-80MM)

NIIN: 01-425-3034
In stock
NSN: 5331-01-425-3034
FSC Code: 5331
MPN: WVTB70180MM

5331-17-110-4198 (WVTB-NOVA)

NIIN: 17-110-4198
In stock
NSN: 5331-17-110-4198
FSC Code: 5331
MPN: WVTBNOVA

5331-01-567-0188 (WT-02282)

NIIN: 01-567-0188
In stock
NSN: 5331-01-567-0188
FSC Code: 5331
MPN: WT02282

5331-01-423-3249 (WR4-760)

NIIN: 01-423-3249
In stock
NSN: 5331-01-423-3249
FSC Code: 5331
MPN: WR4760

5331-01-433-5288 (WA29908525)

NIIN: 01-433-5288
In stock
NSN: 5331-01-433-5288
FSC Code: 5331
MPN: WA29908525

5331-01-439-8838 (W51BF-E-LH-3PC3)

NIIN: 01-439-8838
In stock
NSN: 5331-01-439-8838
FSC Code: 5331
MPN: W51BFELH3PC3

5331-25-150-2521 (W411/14-62)

NIIN: 25-150-2521
In stock
NSN: 5331-25-150-2521
FSC Code: 5331
MPN: W4111462

5331-01-420-2103 (W10LF-40-A-12)

NIIN: 01-420-2103
In stock
NSN: 5331-01-420-2103
FSC Code: 5331
MPN: W10LF40A12

5331-01-420-2102 (W10LF-40-A-11)

NIIN: 01-420-2102
In stock
NSN: 5331-01-420-2102
FSC Code: 5331
MPN: W10LF40A11

5331-01-420-2104 (W10LF-40-A-13)

NIIN: 01-420-2104
In stock
NSN: 5331-01-420-2104
FSC Code: 5331
MPN: W10LF40A13

5331-01-385-4716 (W007053100)

NIIN: 01-385-4716
In stock
NSN: 5331-01-385-4716
FSC Code: 5331
MPN: W007053100

5331-01-385-1538 (W007001218)

NIIN: 01-385-1538
In stock
NSN: 5331-01-385-1538
FSC Code: 5331
MPN: W007001218

5331-01-385-3853 (W007031011)

NIIN: 01-385-3853
In stock
NSN: 5331-01-385-3853
FSC Code: 5331
MPN: W007031011

5331-01-385-3857 (W007001398)

NIIN: 01-385-3857
In stock
NSN: 5331-01-385-3857
FSC Code: 5331
MPN: W007001398

5331-01-385-1548 (W007029900)

NIIN: 01-385-1548
In stock
NSN: 5331-01-385-1548
FSC Code: 5331
MPN: W007029900

5331-01-388-9022 (W007000856)

NIIN: 01-388-9022
In stock
NSN: 5331-01-388-9022
FSC Code: 5331
MPN: W007000856

5331-01-389-6091 (W007001084)

NIIN: 01-389-6091
In stock
NSN: 5331-01-389-6091
FSC Code: 5331
MPN: W007001084