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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.

5331-01-542-3138 (12X1.5)

NIIN: 01-542-3138
In stock
NSN: 5331-01-542-3138
FSC Code: 5331
MPN: 12X15

5331-01-384-2508 (12T34030)

NIIN: 01-384-2508
In stock
NSN: 5331-01-384-2508
FSC Code: 5331
MPN: 12T34030

5331-01-331-9292 (3X00057)

NIIN: 01-331-9292
In stock
NSN: 5331-01-331-9292
FSC Code: 5331
MPN: 3X00057

5331-01-384-2537 (12T34002)

NIIN: 01-384-2537
In stock
NSN: 5331-01-384-2537
FSC Code: 5331
MPN: 12T34002

5331-01-333-3565 (3X00029)

NIIN: 01-333-3565
In stock
NSN: 5331-01-333-3565
FSC Code: 5331
MPN: 3X00029

5331-01-331-9291 (3X00006)

NIIN: 01-331-9291
In stock
NSN: 5331-01-331-9291
FSC Code: 5331
MPN: 3X00006

5331-01-384-2511 (12T34003)

NIIN: 01-384-2511
In stock
NSN: 5331-01-384-2511
FSC Code: 5331
MPN: 12T34003

5331-01-331-9290 (3X00041)

NIIN: 01-331-9290
In stock
NSN: 5331-01-331-9290
FSC Code: 5331
MPN: 3X00041

5331-01-333-3566 (3X00014)

NIIN: 01-333-3566
In stock
NSN: 5331-01-333-3566
FSC Code: 5331
MPN: 3X00014

5331-01-473-7148 (12Q0-V1)

NIIN: 01-473-7148
In stock
NSN: 5331-01-473-7148
FSC Code: 5331
MPN: 12Q0V1

5331-00-559-6740 (3W45918)

NIIN: 00-559-6740
In stock
NSN: 5331-00-559-6740
FSC Code: 5331
MPN: 3W45918

5331-00-559-6756 (3W34348T)

NIIN: 00-559-6756
In stock
NSN: 5331-00-559-6756
FSC Code: 5331
MPN: 3W34348T

5331-01-221-9640 (3W0761)

NIIN: 01-221-9640
In stock
NSN: 5331-01-221-9640
FSC Code: 5331
MPN: 3W0761

5331-01-181-2433 (3W0714)

NIIN: 01-181-2433
In stock
NSN: 5331-01-181-2433
FSC Code: 5331
MPN: 3W0714

5331-01-221-9641 (3W0765)

NIIN: 01-221-9641
In stock
NSN: 5331-01-221-9641
FSC Code: 5331
MPN: 3W0765

5331-01-181-2429 (3W00813)

NIIN: 01-181-2429
In stock
NSN: 5331-01-181-2429
FSC Code: 5331
MPN: 3W00813

5331-01-298-4732 (3V5478)

NIIN: 01-298-4732
In stock
NSN: 5331-01-298-4732
FSC Code: 5331
MPN: 3V5478

5331-01-569-4391 (12KP617)

NIIN: 01-569-4391
In stock
NSN: 5331-01-569-4391
FSC Code: 5331
MPN: 12KP617

5331-01-569-4273 (12KP616)

NIIN: 01-569-4273
In stock
NSN: 5331-01-569-4273
FSC Code: 5331
MPN: 12KP616

5331-01-460-9149 (8023N7011)

NIIN: 01-460-9149
In stock
NSN: 5331-01-460-9149
FSC Code: 5331
MPN: 8023N7011

5331-01-569-6687 (12KP417)

NIIN: 01-569-6687
In stock
NSN: 5331-01-569-6687
FSC Code: 5331
MPN: 12KP417

5331-01-569-3728 (12KP618)

NIIN: 01-569-3728
In stock
NSN: 5331-01-569-3728
FSC Code: 5331
MPN: 12KP618

5331-01-569-7922 (12KP401)

NIIN: 01-569-7922
In stock
NSN: 5331-01-569-7922
FSC Code: 5331
MPN: 12KP401

5331-01-298-4733 (3V5479)

NIIN: 01-298-4733
In stock
NSN: 5331-01-298-4733
FSC Code: 5331
MPN: 3V5479

5331-01-541-9073 (CV187023)

NIIN: 01-541-9073
In stock
NSN: 5331-01-541-9073
FSC Code: 5331
MPN: CV187023

5331-00-231-3229 (3T16164)

NIIN: 00-231-3229
In stock
NSN: 5331-00-231-3229
FSC Code: 5331
MPN: 3T16164

5331-01-357-7217 (7-GTR-PS)

NIIN: 01-357-7217
In stock
NSN: 5331-01-357-7217
FSC Code: 5331
MPN: 7GTRPS

5331-00-104-4372 (3S6538)

NIIN: 00-104-4372
In stock
NSN: 5331-00-104-4372
FSC Code: 5331
MPN: 3S6538

5331-00-104-4371 (3S5496)

NIIN: 00-104-4371
In stock
NSN: 5331-00-104-4371
FSC Code: 5331
MPN: 3S5496

5331-01-260-4682 (3S-5441-3)

NIIN: 01-260-4682
In stock
NSN: 5331-01-260-4682
FSC Code: 5331
MPN: 3S54413

5331-01-258-4644 (3S-5441-4)

NIIN: 01-258-4644
In stock
NSN: 5331-01-258-4644
FSC Code: 5331
MPN: 3S54414

5331-01-255-1052 (3S-5429-5)

NIIN: 01-255-1052
In stock
NSN: 5331-01-255-1052
FSC Code: 5331
MPN: 3S54295

5331-01-260-7560 (3S-5441-1)

NIIN: 01-260-7560
In stock
NSN: 5331-01-260-7560
FSC Code: 5331
MPN: 3S54411

5331-01-255-1051 (3S-5429-5)

NIIN: 01-255-1051
In stock
NSN: 5331-01-255-1051
FSC Code: 5331
MPN: 3S54295

5331-01-181-0599 (3S-5271-24)

NIIN: 01-181-0599
In stock
NSN: 5331-01-181-0599
FSC Code: 5331
MPN: 3S527124

5331-01-129-0362 (3S-5271-13)

NIIN: 01-129-0362
In stock
NSN: 5331-01-129-0362
FSC Code: 5331
MPN: 3S527113

5331-00-118-6360 (3S3977)

NIIN: 00-118-6360
In stock
NSN: 5331-00-118-6360
FSC Code: 5331
MPN: 3S3977

5331-00-553-2014 (3S3987)

NIIN: 00-553-2014
In stock
NSN: 5331-00-553-2014
FSC Code: 5331
MPN: 3S3987

5331-01-019-2600 (3S3074)

NIIN: 01-019-2600
In stock
NSN: 5331-01-019-2600
FSC Code: 5331
MPN: 3S3074

5331-00-913-8877 (3R5948)

NIIN: 00-913-8877
In stock
NSN: 5331-00-913-8877
FSC Code: 5331
MPN: 3R5948

5331-00-913-8876 (3R5947)

NIIN: 00-913-8876
In stock
NSN: 5331-00-913-8876
FSC Code: 5331
MPN: 3R5947

5331-00-862-3007 (3PS628)

NIIN: 00-862-3007
In stock
NSN: 5331-00-862-3007
FSC Code: 5331
MPN: 3PS628

5331-01-363-0233 (12A8995X022)

NIIN: 01-363-0233
In stock
NSN: 5331-01-363-0233
FSC Code: 5331
MPN: 12A8995X022

5331-01-363-0676 (12A9136X012)

NIIN: 01-363-0676
In stock
NSN: 5331-01-363-0676
FSC Code: 5331
MPN: 12A9136X012

5331-00-285-9871 (3P750)

NIIN: 00-285-9871
In stock
NSN: 5331-00-285-9871
FSC Code: 5331
MPN: 3P750

5331-01-305-6547 (3P440)

NIIN: 01-305-6547
In stock
NSN: 5331-01-305-6547
FSC Code: 5331
MPN: 3P440

5331-01-392-5132 (200-451-700)

NIIN: 01-392-5132
In stock
NSN: 5331-01-392-5132
FSC Code: 5331
MPN: 200451700

5331-01-392-5125 (200-453-700)

NIIN: 01-392-5125
In stock
NSN: 5331-01-392-5125
FSC Code: 5331
MPN: 200453700