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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.

5331-01-522-3196 (12438370-019)

NIIN: 01-522-3196
In stock
NSN: 5331-01-522-3196
FSC Code: 5331
MPN: 12438370019

5331-01-272-7461 (38-79004-0031-1)

NIIN: 01-272-7461
In stock
NSN: 5331-01-272-7461
FSC Code: 5331
MPN: 387900400311

5331-01-142-4813 (38-79004-0053-0)

NIIN: 01-142-4813
In stock
NSN: 5331-01-142-4813
FSC Code: 5331
MPN: 387900400530

5331-01-522-1350 (12438370-013)

NIIN: 01-522-1350
In stock
NSN: 5331-01-522-1350
FSC Code: 5331
MPN: 12438370013

5331-01-522-1354 (12438370-015)

NIIN: 01-522-1354
In stock
NSN: 5331-01-522-1354
FSC Code: 5331
MPN: 12438370015

5331-01-272-7460 (38-76504-1236-2)

NIIN: 01-272-7460
In stock
NSN: 5331-01-272-7460
FSC Code: 5331
MPN: 387650412362

5331-01-223-9634 (38-76504-1046-2)

NIIN: 01-223-9634
In stock
NSN: 5331-01-223-9634
FSC Code: 5331
MPN: 387650410462

5331-00-913-3441 (38-76504-1114-2)

NIIN: 00-913-3441
In stock
NSN: 5331-00-913-3441
FSC Code: 5331
MPN: 387650411142

5331-00-599-8663 (38-76504-1032-2)

NIIN: 00-599-8663
In stock
NSN: 5331-00-599-8663
FSC Code: 5331
MPN: 387650410322

5331-01-274-4496 (38-76504-1018-2)

NIIN: 01-274-4496
In stock
NSN: 5331-01-274-4496
FSC Code: 5331
MPN: 387650410182

5331-01-272-7459 (38-76504-1038-2)

NIIN: 01-272-7459
In stock
NSN: 5331-01-272-7459
FSC Code: 5331
MPN: 387650410382

5331-01-224-2547 (38-76504-0053-1)

NIIN: 01-224-2547
In stock
NSN: 5331-01-224-2547
FSC Code: 5331
MPN: 387650400531

5331-01-537-0666 (12422548-010)

NIIN: 01-537-0666
In stock
NSN: 5331-01-537-0666
FSC Code: 5331
MPN: 12422548010

5331-01-570-7467 (12417664-002)

NIIN: 01-570-7467
In stock
NSN: 5331-01-570-7467
FSC Code: 5331
MPN: 12417664002

5331-00-891-8999 (386-2INPK)

NIIN: 00-891-8999
In stock
NSN: 5331-00-891-8999
FSC Code: 5331
MPN: 3862INPK

5331-01-033-5268 (386-000-5060)

NIIN: 01-033-5268
In stock
NSN: 5331-01-033-5268
FSC Code: 5331
MPN: 3860005060

5331-12-309-4804 (780 400 4 8977804004)

NIIN: 12-309-4804
In stock
NSN: 5331-12-309-4804
FSC Code: 5331
MPN: 78040048977804004

5331-00-653-0296 (3855B)

NIIN: 00-653-0296
In stock
NSN: 5331-00-653-0296
FSC Code: 5331
MPN: 3855B

5331-01-406-7808 (1240624H1)

NIIN: 01-406-7808
In stock
NSN: 5331-01-406-7808
FSC Code: 5331
MPN: 1240624H1

5331-01-506-2125 (6736-61-1520)

NIIN: 01-506-2125
In stock
NSN: 5331-01-506-2125
FSC Code: 5331
MPN: 6736611520

5331-00-138-9010 (385-22)

NIIN: 00-138-9010
In stock
NSN: 5331-00-138-9010
FSC Code: 5331
MPN: 38522

5331-01-425-0344 (OR3012450-N762A)

NIIN: 01-425-0344
In stock
NSN: 5331-01-425-0344
FSC Code: 5331
MPN: OR3012450N762A

5331-01-455-9280 (124)

NIIN: 01-455-9280
In stock
NSN: 5331-01-455-9280
FSC Code: 5331
MPN: 124

5331-01-099-4915 (385026A161353)

NIIN: 01-099-4915
In stock
NSN: 5331-01-099-4915
FSC Code: 5331
MPN: 385026A161353

5331-01-288-1062 (385-0520)

NIIN: 01-288-1062
In stock
NSN: 5331-01-288-1062
FSC Code: 5331
MPN: 3850520

5331-01-099-4914 (385026A161347)

NIIN: 01-099-4914
In stock
NSN: 5331-01-099-4914
FSC Code: 5331
MPN: 385026A161347

5331-01-311-1476 (384770R91)

NIIN: 01-311-1476
In stock
NSN: 5331-01-311-1476
FSC Code: 5331
MPN: 384770R91

5331-01-311-5946 (384349R1)

NIIN: 01-311-5946
In stock
NSN: 5331-01-311-5946
FSC Code: 5331
MPN: 384349R1

5331-00-172-2398 (38-403-029)

NIIN: 00-172-2398
In stock
NSN: 5331-00-172-2398
FSC Code: 5331
MPN: 38403029

5331-00-007-6145 (38-403-030)

NIIN: 00-007-6145
In stock
NSN: 5331-00-007-6145
FSC Code: 5331
MPN: 38403030

5331-01-075-5980 (382781R1)

NIIN: 01-075-5980
In stock
NSN: 5331-01-075-5980
FSC Code: 5331
MPN: 382781R1

5331-01-111-7396 (382432RI)

NIIN: 01-111-7396
In stock
NSN: 5331-01-111-7396
FSC Code: 5331
MPN: 382432RI

5331-01-004-7919 (3817016-1)

NIIN: 01-004-7919
In stock
NSN: 5331-01-004-7919
FSC Code: 5331
MPN: 38170161

5331-01-190-5649 (3815-13)

NIIN: 01-190-5649
In stock
NSN: 5331-01-190-5649
FSC Code: 5331
MPN: 381513

5331-01-266-0765 (38149-2)

NIIN: 01-266-0765
In stock
NSN: 5331-01-266-0765
FSC Code: 5331
MPN: 381492

5331-01-228-3246 (38-1165-0021)

NIIN: 01-228-3246
In stock
NSN: 5331-01-228-3246
FSC Code: 5331
MPN: 3811650021

5331-01-164-4497 (380-S-19)

NIIN: 01-164-4497
In stock
NSN: 5331-01-164-4497
FSC Code: 5331
MPN: 380S19

5331-00-171-5681 (380S25)

NIIN: 00-171-5681
In stock
NSN: 5331-00-171-5681
FSC Code: 5331
MPN: 380S25

5331-01-164-4496 (380-S-15)

NIIN: 01-164-4496
In stock
NSN: 5331-01-164-4496
FSC Code: 5331
MPN: 380S15

5331-00-171-5678 (380S18)

NIIN: 00-171-5678
In stock
NSN: 5331-00-171-5678
FSC Code: 5331
MPN: 380S18

5331-00-157-6630 (3803-28)

NIIN: 00-157-6630
In stock
NSN: 5331-00-157-6630
FSC Code: 5331
MPN: 380328

5331-00-157-6632 (3803-20)

NIIN: 00-157-6632
In stock
NSN: 5331-00-157-6632
FSC Code: 5331
MPN: 380320

5331-01-365-9386 (12399F18-456C)

NIIN: 01-365-9386
In stock
NSN: 5331-01-365-9386
FSC Code: 5331
MPN: 12399F18456C

5331-01-446-1211 (123-916-5)

NIIN: 01-446-1211
In stock
NSN: 5331-01-446-1211
FSC Code: 5331
MPN: 1239165

5331-01-572-0215 (35007REVIITEM6)

NIIN: 01-572-0215
In stock
NSN: 5331-01-572-0215
FSC Code: 5331
MPN: 35007REVIITEM6

5331-01-536-1969 (123-932-5)

NIIN: 01-536-1969
In stock
NSN: 5331-01-536-1969
FSC Code: 5331
MPN: 1239325

5331-01-446-1185 (123-906-5)

NIIN: 01-446-1185
In stock
NSN: 5331-01-446-1185
FSC Code: 5331
MPN: 1239065

5331-01-446-1210 (123-910-5)

NIIN: 01-446-1210
In stock
NSN: 5331-01-446-1210
FSC Code: 5331
MPN: 1239105