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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.

5331-00-251-4237 (F73125-258)

NIIN: 00-251-4237
In stock
NSN: 5331-00-251-4237
FSC Code: 5331
MPN: F73125258

5331-01-539-6374 (721G8FS-777-P2)

NIIN: 01-539-6374
In stock
NSN: 5331-01-539-6374
FSC Code: 5331
MPN: 721G8FS777P2

5331-01-362-5045 (721-7069909-40)

NIIN: 01-362-5045
In stock
NSN: 5331-01-362-5045
FSC Code: 5331
MPN: 721706990940

5331-01-389-8782 (7213FT-972-4780)

NIIN: 01-389-8782
In stock
NSN: 5331-01-389-8782
FSC Code: 5331
MPN: 7213FT9724780

5331-01-466-0625 (AS568A-132-70FS)

NIIN: 01-466-0625
In stock
NSN: 5331-01-466-0625
FSC Code: 5331
MPN: AS568A13270FS

5331-01-465-1817 (721-30-B5-G2)

NIIN: 01-465-1817
In stock
NSN: 5331-01-465-1817
FSC Code: 5331
MPN: 72130B5G2

5331-00-082-1120 (F6543PC563)

NIIN: 00-082-1120
In stock
NSN: 5331-00-082-1120
FSC Code: 5331
MPN: F6543PC563

5331-01-290-7412 (F-637-31-3IN)

NIIN: 01-290-7412
In stock
NSN: 5331-01-290-7412
FSC Code: 5331
MPN: F637313IN

5331-01-281-0532 (F63931-MG)

NIIN: 01-281-0532
In stock
NSN: 5331-01-281-0532
FSC Code: 5331
MPN: F63931MG

5331-01-282-0750 (F637-31-2IN-13PACKING)

NIIN: 01-282-0750
In stock
NSN: 5331-01-282-0750
FSC Code: 5331
MPN: F637312IN13PACKING

5331-01-285-9338 (F593G001-17)

NIIN: 01-285-9338
In stock
NSN: 5331-01-285-9338
FSC Code: 5331
MPN: F593G00117

5331-01-295-5671 (F5557)

NIIN: 01-295-5671
In stock
NSN: 5331-01-295-5671
FSC Code: 5331
MPN: F5557

5331-01-295-5672 (F5561)

NIIN: 01-295-5672
In stock
NSN: 5331-01-295-5672
FSC Code: 5331
MPN: F5561

5331-01-313-5689 (F56E)

NIIN: 01-313-5689
In stock
NSN: 5331-01-313-5689
FSC Code: 5331
MPN: F56E

5331-01-308-5850 (F-55279-1)

NIIN: 01-308-5850
In stock
NSN: 5331-01-308-5850
FSC Code: 5331
MPN: F552791

5331-00-998-3468 (F5169271-1)

NIIN: 00-998-3468
In stock
NSN: 5331-00-998-3468
FSC Code: 5331
MPN: F51692711

5331-00-998-3470 (F5169289-1)

NIIN: 00-998-3470
In stock
NSN: 5331-00-998-3470
FSC Code: 5331
MPN: F51692891

5331-01-169-5473 (F-501-12)

NIIN: 01-169-5473
In stock
NSN: 5331-01-169-5473
FSC Code: 5331
MPN: F50112

5331-01-324-0448 (F-46668-6)

NIIN: 01-324-0448
In stock
NSN: 5331-01-324-0448
FSC Code: 5331
MPN: F466686

5331-01-320-3442 (F-47727)

NIIN: 01-320-3442
In stock
NSN: 5331-01-320-3442
FSC Code: 5331
MPN: F47727

5331-01-529-8369 (72004/5/7)

NIIN: 01-529-8369
In stock
NSN: 5331-01-529-8369
FSC Code: 5331
MPN: 7200457

5331-01-312-0625 (F-46670-1/2IN)

NIIN: 01-312-0625
In stock
NSN: 5331-01-312-0625
FSC Code: 5331
MPN: F4667012IN

5331-01-324-0447 (F-46668-4)

NIIN: 01-324-0447
In stock
NSN: 5331-01-324-0447
FSC Code: 5331
MPN: F466684

5331-01-313-5684 (F-46662)

NIIN: 01-313-5684
In stock
NSN: 5331-01-313-5684
FSC Code: 5331
MPN: F46662

5331-01-214-6495 (F-466)

NIIN: 01-214-6495
In stock
NSN: 5331-01-214-6495
FSC Code: 5331
MPN: F466

5331-00-250-3007 (F430-8A)

NIIN: 00-250-3007
In stock
NSN: 5331-00-250-3007
FSC Code: 5331
MPN: F4308A

5331-01-383-0639 (71X261D6)

NIIN: 01-383-0639
In stock
NSN: 5331-01-383-0639
FSC Code: 5331
MPN: 71X261D6

5331-01-391-9836 (AMS-P-83461/MIL-P-83461/1/219)

NIIN: 01-391-9836
In stock
NSN: 5331-01-391-9836
FSC Code: 5331
MPN: AMSP83461MILP834611219

5331-00-548-4480 (F375B212)

NIIN: 00-548-4480
In stock
NSN: 5331-00-548-4480
FSC Code: 5331
MPN: F375B212

5331-01-021-6883 (F-375-B-229-SU-A)

NIIN: 01-021-6883
In stock
NSN: 5331-01-021-6883
FSC Code: 5331
MPN: F375B229SUA

5331-01-026-5847 (F-375-B-218-BUNA-N)

NIIN: 01-026-5847
In stock
NSN: 5331-01-026-5847
FSC Code: 5331
MPN: F375B218BUNAN

5331-00-838-7863 (F-375-B-225-SU-)

NIIN: 00-838-7863
In stock
NSN: 5331-00-838-7863
FSC Code: 5331
MPN: F375B225SU

5331-01-234-7616 (F-375-B-212-QMA)

NIIN: 01-234-7616
In stock
NSN: 5331-01-234-7616
FSC Code: 5331
MPN: F375B212QMA

5331-01-110-1153 (F-375-B-111-SK-A)

NIIN: 01-110-1153
In stock
NSN: 5331-01-110-1153
FSC Code: 5331
MPN: F375B111SKA

5331-00-571-9694 (F375B117QTA)

NIIN: 00-571-9694
In stock
NSN: 5331-00-571-9694
FSC Code: 5331
MPN: F375B117QTA

5331-01-141-9568 (F-375-B-211)

NIIN: 01-141-9568
In stock
NSN: 5331-01-141-9568
FSC Code: 5331
MPN: F375B211

5331-00-571-9695 (F375B115QTA)

NIIN: 00-571-9695
In stock
NSN: 5331-00-571-9695
FSC Code: 5331
MPN: F375B115QTA

5331-01-011-8001 (F-375-B-013-SK-A)

NIIN: 01-011-8001
In stock
NSN: 5331-01-011-8001
FSC Code: 5331
MPN: F375B013SKA

5331-01-033-9525 (F-375-B-113-SU-A)

NIIN: 01-033-9525
In stock
NSN: 5331-01-033-9525
FSC Code: 5331
MPN: F375B113SUA

5331-00-484-1182 (F375B015SUA)

NIIN: 00-484-1182
In stock
NSN: 5331-00-484-1182
FSC Code: 5331
MPN: F375B015SUA

5331-01-120-4392 (F-375-B-015-QT-A)

NIIN: 01-120-4392
In stock
NSN: 5331-01-120-4392
FSC Code: 5331
MPN: F375B015QTA

5331-01-011-7058 (F-375-B-006-SK-A)

NIIN: 01-011-7058
In stock
NSN: 5331-01-011-7058
FSC Code: 5331
MPN: F375B006SKA

5331-00-406-0829 (F375B010QTA)

NIIN: 00-406-0829
In stock
NSN: 5331-00-406-0829
FSC Code: 5331
MPN: F375B010QTA

5331-01-107-9300 (F-375-B-009-SK-A)

NIIN: 01-107-9300
In stock
NSN: 5331-01-107-9300
FSC Code: 5331
MPN: F375B009SKA

5331-01-011-8000 (F-375-B-011-SK-A)

NIIN: 01-011-8000
In stock
NSN: 5331-01-011-8000
FSC Code: 5331
MPN: F375B011SKA

5331-01-035-7644 (F375B015QM-A)

NIIN: 01-035-7644
In stock
NSN: 5331-01-035-7644
FSC Code: 5331
MPN: F375B015QMA

5331-01-011-7056 (F-375-B-004-SK-A)

NIIN: 01-011-7056
In stock
NSN: 5331-01-011-7056
FSC Code: 5331
MPN: F375B004SKA

5331-01-108-4452 (F-375-B-010-SK-A)

NIIN: 01-108-4452
In stock
NSN: 5331-01-108-4452
FSC Code: 5331
MPN: F375B010SKA