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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.

5331-01-363-4830 (ND61377)

NIIN: 01-363-4830
In stock
NSN: 5331-01-363-4830
FSC Code: 5331
MPN: ND61377

5331-99-380-6762 (SA16222/10)

NIIN: 99-380-6762
In stock
NSN: 5331-99-380-6762
FSC Code: 5331
MPN: SA1622210

5331-01-559-4398 (ND11255)

NIIN: 01-559-4398
In stock
NSN: 5331-01-559-4398
FSC Code: 5331
MPN: ND11255

5331-01-460-8907 (ND8324-8)

NIIN: 01-460-8907
In stock
NSN: 5331-01-460-8907
FSC Code: 5331
MPN: ND83248

5331-01-460-8902 (ND8324-7)

NIIN: 01-460-8902
In stock
NSN: 5331-01-460-8902
FSC Code: 5331
MPN: ND83247

5331-01-422-5001 (NB39802972)

NIIN: 01-422-5001
In stock
NSN: 5331-01-422-5001
FSC Code: 5331
MPN: NB39802972

5331-01-373-4790 (NB39824872)

NIIN: 01-373-4790
In stock
NSN: 5331-01-373-4790
FSC Code: 5331
MPN: NB39824872

5331-01-439-0903 (NB39823272)

NIIN: 01-439-0903
In stock
NSN: 5331-01-439-0903
FSC Code: 5331
MPN: NB39823272

5331-01-373-4791 (NB39891672)

NIIN: 01-373-4791
In stock
NSN: 5331-01-373-4791
FSC Code: 5331
MPN: NB39891672

5331-01-373-4792 (NB39890472)

NIIN: 01-373-4792
In stock
NSN: 5331-01-373-4792
FSC Code: 5331
MPN: NB39890472

5331-01-450-7640 (NB-252217-IN-0125)

NIIN: 01-450-7640
In stock
NSN: 5331-01-450-7640
FSC Code: 5331
MPN: NB252217IN0125

5331-01-482-3020 (NASS1593*128)

In stock

5331-01-464-0888 (NAT133)

NIIN: 01-464-0888
In stock
NSN: 5331-01-464-0888
FSC Code: 5331
MPN: NAT133

5331-01-482-4991 (NAS1611-275AQ)

NIIN: 01-482-4991
In stock
NSN: 5331-01-482-4991
FSC Code: 5331
MPN: NAS1611275AQ

5331-01-487-8908 (NAS1661-258)

NIIN: 01-487-8908
In stock
NSN: 5331-01-487-8908
FSC Code: 5331
MPN: NAS1661258

5331-01-538-3472 (NAS1611-176A)

NIIN: 01-538-3472
In stock
NSN: 5331-01-538-3472
FSC Code: 5331
MPN: NAS1611176A

5331-01-515-9739 (NAS1612-6A)

NIIN: 01-515-9739
In stock
NSN: 5331-01-515-9739
FSC Code: 5331
MPN: NAS16126A

5331-01-380-7521 (NAS1611-362A)

NIIN: 01-380-7521
In stock
NSN: 5331-01-380-7521
FSC Code: 5331
MPN: NAS1611362A

5331-01-458-6562 (NAS1611-271)

NIIN: 01-458-6562
In stock
NSN: 5331-01-458-6562
FSC Code: 5331
MPN: NAS1611271

5331-01-568-7347 (NAS1611-464)

NIIN: 01-568-7347
In stock
NSN: 5331-01-568-7347
FSC Code: 5331
MPN: NAS1611464

5331-01-482-4014 (NAS1611-171)

NIIN: 01-482-4014
In stock
NSN: 5331-01-482-4014
FSC Code: 5331
MPN: NAS1611171

5331-01-494-8310 (NAS1611-387)

NIIN: 01-494-8310
In stock
NSN: 5331-01-494-8310
FSC Code: 5331
MPN: NAS1611387

5331-01-481-5080 (NAS1611-248)

NIIN: 01-481-5080
In stock
NSN: 5331-01-481-5080
FSC Code: 5331
MPN: NAS1611248

5331-01-543-1328 (NAS1612-8A)

NIIN: 01-543-1328
In stock
NSN: 5331-01-543-1328
FSC Code: 5331
MPN: NAS16128A

5331-01-543-1329 (NAS1611-014A)

NIIN: 01-543-1329
In stock
NSN: 5331-01-543-1329
FSC Code: 5331
MPN: NAS1611014A

5331-01-472-3908 (NAS1611-172)

NIIN: 01-472-3908
In stock
NSN: 5331-01-472-3908
FSC Code: 5331
MPN: NAS1611172

5331-01-528-8032 (NAS1611-259A)

NIIN: 01-528-8032
In stock
NSN: 5331-01-528-8032
FSC Code: 5331
MPN: NAS1611259A

5331-01-391-8994 (NAS1611-229)

NIIN: 01-391-8994
In stock
NSN: 5331-01-391-8994
FSC Code: 5331
MPN: NAS1611229

5331-01-507-5443 (NAS1612-9)

NIIN: 01-507-5443
In stock
NSN: 5331-01-507-5443
FSC Code: 5331
MPN: NAS16129

5331-01-494-9159 (NAS1611-381)

NIIN: 01-494-9159
In stock
NSN: 5331-01-494-9159
FSC Code: 5331
MPN: NAS1611381

5331-01-385-3732 (NAS1611-231)

NIIN: 01-385-3732
In stock
NSN: 5331-01-385-3732
FSC Code: 5331
MPN: NAS1611231

5331-01-482-4967 (NAS1611-050)

NIIN: 01-482-4967
In stock
NSN: 5331-01-482-4967
FSC Code: 5331
MPN: NAS1611050

5331-01-494-3731 (NAS1611-247)

NIIN: 01-494-3731
In stock
NSN: 5331-01-494-3731
FSC Code: 5331
MPN: NAS1611247

5331-01-389-8839 (NAS1611-017)

NIIN: 01-389-8839
In stock
NSN: 5331-01-389-8839
FSC Code: 5331
MPN: NAS1611017

5331-01-543-1330 (NAS1611-013A)

NIIN: 01-543-1330
In stock
NSN: 5331-01-543-1330
FSC Code: 5331
MPN: NAS1611013A

5331-01-368-9956 (NAS1602-902)

NIIN: 01-368-9956
In stock
NSN: 5331-01-368-9956
FSC Code: 5331
MPN: NAS1602902

5331-01-541-3872 (NAS1611-162A)

NIIN: 01-541-3872
In stock
NSN: 5331-01-541-3872
FSC Code: 5331
MPN: NAS1611162A

5331-01-517-6559 (NAS1611-211A)

NIIN: 01-517-6559
In stock
NSN: 5331-01-517-6559
FSC Code: 5331
MPN: NAS1611211A

5331-01-515-4351 (NAS1611-112A)

NIIN: 01-515-4351
In stock
NSN: 5331-01-515-4351
FSC Code: 5331
MPN: NAS1611112A

5331-01-393-8573 (NAS1601-242)

NIIN: 01-393-8573
In stock
NSN: 5331-01-393-8573
FSC Code: 5331
MPN: NAS1601242

5331-01-549-6897 (NAS1611-139A)

NIIN: 01-549-6897
In stock
NSN: 5331-01-549-6897
FSC Code: 5331
MPN: NAS1611139A

5331-01-546-4546 (NAS1611-143A)

NIIN: 01-546-4546
In stock
NSN: 5331-01-546-4546
FSC Code: 5331
MPN: NAS1611143A

5331-01-368-9958 (NAS1602-928)

NIIN: 01-368-9958
In stock
NSN: 5331-01-368-9958
FSC Code: 5331
MPN: NAS1602928

5331-01-380-5161 (NAS1611-244A)

NIIN: 01-380-5161
In stock
NSN: 5331-01-380-5161
FSC Code: 5331
MPN: NAS1611244A

5331-01-388-6867 (NAS1601-176)

NIIN: 01-388-6867
In stock
NSN: 5331-01-388-6867
FSC Code: 5331
MPN: NAS1601176

5331-01-524-9380 (NAS1611-107)

NIIN: 01-524-9380
In stock
NSN: 5331-01-524-9380
FSC Code: 5331
MPN: NAS1611107

5331-01-369-9747 (NAS1602-910)

NIIN: 01-369-9747
In stock
NSN: 5331-01-369-9747
FSC Code: 5331
MPN: NAS1602910

5331-01-386-5849 (NAS1601-258)

NIIN: 01-386-5849
In stock
NSN: 5331-01-386-5849
FSC Code: 5331
MPN: NAS1601258