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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.

5331-00-465-2739 (40-3N56)

NIIN: 00-465-2739
In stock
NSN: 5331-00-465-2739
FSC Code: 5331
MPN: 403N56

5331-01-256-0430 (40398-4)

NIIN: 01-256-0430
In stock
NSN: 5331-01-256-0430
FSC Code: 5331
MPN: 403984

5331-01-244-5960 (40397-09)

NIIN: 01-244-5960
In stock
NSN: 5331-01-244-5960
FSC Code: 5331
MPN: 4039709

5331-01-122-3037 (4039-77)

NIIN: 01-122-3037
In stock
NSN: 5331-01-122-3037
FSC Code: 5331
MPN: 403977

5331-01-462-0147 (134-517)

NIIN: 01-462-0147
In stock
NSN: 5331-01-462-0147
FSC Code: 5331
MPN: 134517

5331-00-599-6420 (4036D16)

NIIN: 00-599-6420
In stock
NSN: 5331-00-599-6420
FSC Code: 5331
MPN: 4036D16

5331-00-479-0510 (4036D19)

NIIN: 00-479-0510
In stock
NSN: 5331-00-479-0510
FSC Code: 5331
MPN: 4036D19

5331-01-477-0387 (134425-000)

NIIN: 01-477-0387
In stock
NSN: 5331-01-477-0387
FSC Code: 5331
MPN: 134425000

5331-00-298-0486 (4036D20)

NIIN: 00-298-0486
In stock
NSN: 5331-00-298-0486
FSC Code: 5331
MPN: 4036D20

5331-00-514-3372 (4036D29)

NIIN: 00-514-3372
In stock
NSN: 5331-00-514-3372
FSC Code: 5331
MPN: 4036D29

5331-00-298-0435 (4036D15)

NIIN: 00-298-0435
In stock
NSN: 5331-00-298-0435
FSC Code: 5331
MPN: 4036D15

5331-00-298-0487 (4036D21)

NIIN: 00-298-0487
In stock
NSN: 5331-00-298-0487
FSC Code: 5331
MPN: 4036D21

5331-00-599-6419 (4036D11)

NIIN: 00-599-6419
In stock
NSN: 5331-00-599-6419
FSC Code: 5331
MPN: 4036D11

5331-00-202-1360 (40336-028)

NIIN: 00-202-1360
In stock
NSN: 5331-00-202-1360
FSC Code: 5331
MPN: 40336028

5331-01-302-9342 (403331-10)

NIIN: 01-302-9342
In stock
NSN: 5331-01-302-9342
FSC Code: 5331
MPN: 40333110

5331-00-122-1473 (403-3371)

NIIN: 00-122-1473
In stock
NSN: 5331-00-122-1473
FSC Code: 5331
MPN: 4033371

5331-01-139-4282 (403284-1-C)

NIIN: 01-139-4282
In stock
NSN: 5331-01-139-4282
FSC Code: 5331
MPN: 4032841C

5331-01-161-6044 (403284-4-AD)

NIIN: 01-161-6044
In stock
NSN: 5331-01-161-6044
FSC Code: 5331
MPN: 4032844AD

5331-01-345-0993 (1340DD1016)

NIIN: 01-345-0993
In stock
NSN: 5331-01-345-0993
FSC Code: 5331
MPN: 1340DD1016

5331-01-138-7679 (403284-1-A)

NIIN: 01-138-7679
In stock
NSN: 5331-01-138-7679
FSC Code: 5331
MPN: 4032841A

5331-01-138-5269 (403284-1-B)

NIIN: 01-138-5269
In stock
NSN: 5331-01-138-5269
FSC Code: 5331
MPN: 4032841B

5331-01-419-9541 (133R021)

NIIN: 01-419-9541
In stock
NSN: 5331-01-419-9541
FSC Code: 5331
MPN: 133R021

5331-01-419-9540 (133R018)

NIIN: 01-419-9540
In stock
NSN: 5331-01-419-9540
FSC Code: 5331
MPN: 133R018

5331-01-419-9536 (133R013)

NIIN: 01-419-9536
In stock
NSN: 5331-01-419-9536
FSC Code: 5331
MPN: 133R013

5331-01-419-9544 (133R031)

NIIN: 01-419-9544
In stock
NSN: 5331-01-419-9544
FSC Code: 5331
MPN: 133R031

5331-01-419-9542 (133R022)

NIIN: 01-419-9542
In stock
NSN: 5331-01-419-9542
FSC Code: 5331
MPN: 133R022

5331-01-419-9537 (133R014)

NIIN: 01-419-9537
In stock
NSN: 5331-01-419-9537
FSC Code: 5331
MPN: 133R014

5331-01-419-9538 (133R016)

NIIN: 01-419-9538
In stock
NSN: 5331-01-419-9538
FSC Code: 5331
MPN: 133R016

5331-01-419-9539 (133R017)

NIIN: 01-419-9539
In stock
NSN: 5331-01-419-9539
FSC Code: 5331
MPN: 133R017

5331-01-419-9535 (133R011)

NIIN: 01-419-9535
In stock
NSN: 5331-01-419-9535
FSC Code: 5331
MPN: 133R011

5331-01-105-7045 (40-31044-9)

NIIN: 01-105-7045
In stock
NSN: 5331-01-105-7045
FSC Code: 5331
MPN: 40310449

5331-01-309-7363 (403-1060-027)

NIIN: 01-309-7363
In stock
NSN: 5331-01-309-7363
FSC Code: 5331
MPN: 4031060027

5331-01-309-7362 (403-1060-011)

NIIN: 01-309-7362
In stock
NSN: 5331-01-309-7362
FSC Code: 5331
MPN: 4031060011

5331-01-309-2487 (40-31045-9)

NIIN: 01-309-2487
In stock
NSN: 5331-01-309-2487
FSC Code: 5331
MPN: 40310459

5331-00-684-2422 (403069-15)

NIIN: 00-684-2422
In stock
NSN: 5331-00-684-2422
FSC Code: 5331
MPN: 40306915

5331-01-076-9997 (4030-32)

NIIN: 01-076-9997
In stock
NSN: 5331-01-076-9997
FSC Code: 5331
MPN: 403032

5331-01-437-3461 (1338M79P01)

NIIN: 01-437-3461
In stock
NSN: 5331-01-437-3461
FSC Code: 5331
MPN: 1338M79P01

5331-01-494-5821 (1338M79P01)

NIIN: 01-494-5821
In stock
NSN: 5331-01-494-5821
FSC Code: 5331
MPN: 1338M79P01

5331-01-477-7323 (133-8307)

NIIN: 01-477-7323
In stock
NSN: 5331-01-477-7323
FSC Code: 5331
MPN: 1338307

5331-01-244-5961 (40297-09)

NIIN: 01-244-5961
In stock
NSN: 5331-01-244-5961
FSC Code: 5331
MPN: 4029709

5331-01-324-8283 (4029-3)

NIIN: 01-324-8283
In stock
NSN: 5331-01-324-8283
FSC Code: 5331
MPN: 40293

5331-01-370-5663 (1331+024)

NIIN: 01-370-5663
In stock
NSN: 5331-01-370-5663
FSC Code: 5331
MPN: 1331024

5331-01-370-5664 (1331+020)

NIIN: 01-370-5664
In stock
NSN: 5331-01-370-5664
FSC Code: 5331
MPN: 1331020

5331-00-930-9270 (4025015-1)

NIIN: 00-930-9270
In stock
NSN: 5331-00-930-9270
FSC Code: 5331
MPN: 40250151

5331-01-474-8084 (13305989-001)

NIIN: 01-474-8084
In stock
NSN: 5331-01-474-8084
FSC Code: 5331
MPN: 13305989001

5331-01-452-1649 (2-359E1100-50)

NIIN: 01-452-1649
In stock
NSN: 5331-01-452-1649
FSC Code: 5331
MPN: 2359E110050

5331-01-392-8391 (132-VITON)

NIIN: 01-392-8391
In stock
NSN: 5331-01-392-8391
FSC Code: 5331
MPN: 132VITON

5331-12-195-0755 (700429132000)

NIIN: 12-195-0755
In stock
NSN: 5331-12-195-0755
FSC Code: 5331
MPN: 700429132000