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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.

5331-01-572-3827 (NS-3983)

NIIN: 01-572-3827
In stock
NSN: 5331-01-572-3827
FSC Code: 5331
MPN: NS3983

5331-01-387-5392 (NS-232)

NIIN: 01-387-5392
In stock
NSN: 5331-01-387-5392
FSC Code: 5331
MPN: NS232

5331-01-561-7893 (NO552-2-014)

NIIN: 01-561-7893
In stock
NSN: 5331-01-561-7893
FSC Code: 5331
MPN: NO5522014

5331-01-371-1653 (NO.)

NIIN: 01-371-1653
In stock
NSN: 5331-01-371-1653
FSC Code: 5331
MPN: NO

5331-01-371-5129 (NO.13)

NIIN: 01-371-5129
In stock
NSN: 5331-01-371-5129
FSC Code: 5331
MPN: NO13

5331-01-368-0375 (NNK62-7-10)

NIIN: 01-368-0375
In stock
NSN: 5331-01-368-0375
FSC Code: 5331
MPN: NNK62710

5331-01-485-4212 (NK3000636-50)

NIIN: 01-485-4212
In stock
NSN: 5331-01-485-4212
FSC Code: 5331
MPN: NK300063650

5331-01-392-5101 (NK3467-8)

NIIN: 01-392-5101
In stock
NSN: 5331-01-392-5101
FSC Code: 5331
MPN: NK34678

5331-01-467-9248 (NK1512-1)

NIIN: 01-467-9248
In stock
NSN: 5331-01-467-9248
FSC Code: 5331
MPN: NK15121

5331-01-562-9140 (NH102103-2293AEITEM4)

NIIN: 01-562-9140
In stock
NSN: 5331-01-562-9140
FSC Code: 5331
MPN: NH1021032293AEITEM4

5331-01-425-8414 (NF-4007-B)

NIIN: 01-425-8414
In stock
NSN: 5331-01-425-8414
FSC Code: 5331
MPN: NF4007B

5331-01-425-8406 (NF-4008-B)

NIIN: 01-425-8406
In stock
NSN: 5331-01-425-8406
FSC Code: 5331
MPN: NF4008B

5331-01-425-8433 (NF-4005-B)

NIIN: 01-425-8433
In stock
NSN: 5331-01-425-8433
FSC Code: 5331
MPN: NF4005B

5331-01-425-8409 (NF-4007-A)

NIIN: 01-425-8409
In stock
NSN: 5331-01-425-8409
FSC Code: 5331
MPN: NF4007A

5331-01-419-3873 (NF-109)

NIIN: 01-419-3873
In stock
NSN: 5331-01-419-3873
FSC Code: 5331
MPN: NF109

5331-01-425-8418 (NF-4005-C)

NIIN: 01-425-8418
In stock
NSN: 5331-01-425-8418
FSC Code: 5331
MPN: NF4005C

5331-01-425-8612 (NF-4003-E)

NIIN: 01-425-8612
In stock
NSN: 5331-01-425-8612
FSC Code: 5331
MPN: NF4003E

5331-99-614-3292 (SA1666-12)

NIIN: 99-614-3292
In stock
NSN: 5331-99-614-3292
FSC Code: 5331
MPN: SA166612

5331-99-596-9896 (ND5125)

NIIN: 99-596-9896
In stock
NSN: 5331-99-596-9896
FSC Code: 5331
MPN: ND5125

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