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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.

5331-01-446-8970 (18-AR-32)

NIIN: 01-446-8970
In stock
NSN: 5331-01-446-8970
FSC Code: 5331
MPN: 18AR32

5331-01-466-0704 (18-A-44)

NIIN: 01-466-0704
In stock
NSN: 5331-01-466-0704
FSC Code: 5331
MPN: 18A44

5331-00-813-1566 (5160-534024-5)

NIIN: 00-813-1566
In stock
NSN: 5331-00-813-1566
FSC Code: 5331
MPN: 51605340245

5331-00-543-6630 (5160-534024-8)

NIIN: 00-543-6630
In stock
NSN: 5331-00-543-6630
FSC Code: 5331
MPN: 51605340248

5331-00-585-6027 (5160-534024-4)

NIIN: 00-585-6027
In stock
NSN: 5331-00-585-6027
FSC Code: 5331
MPN: 51605340244

5331-00-813-1567 (5160-534024-12)

NIIN: 00-813-1567
In stock
NSN: 5331-00-813-1567
FSC Code: 5331
MPN: 516053402412

5331-00-809-3816 (5-159)

NIIN: 00-809-3816
In stock
NSN: 5331-00-809-3816
FSC Code: 5331
MPN: 5159

5331-00-180-4241 (5-158C147-7)

NIIN: 00-180-4241
In stock
NSN: 5331-00-180-4241
FSC Code: 5331
MPN: 5158C1477

5331-01-007-1589 (5-158L449-65)

NIIN: 01-007-1589
In stock
NSN: 5331-01-007-1589
FSC Code: 5331
MPN: 5158L44965

5331-01-311-4069 (5158521-1)

NIIN: 01-311-4069
In stock
NSN: 5331-01-311-4069
FSC Code: 5331
MPN: 51585211

5331-00-961-0343 (5-157L449-6)

NIIN: 00-961-0343
In stock
NSN: 5331-00-961-0343
FSC Code: 5331
MPN: 5157L4496

5331-00-901-8734 (5-1575455-7)

NIIN: 00-901-8734
In stock
NSN: 5331-00-901-8734
FSC Code: 5331
MPN: 515754557

5331-01-322-2427 (5157-05)

NIIN: 01-322-2427
In stock
NSN: 5331-01-322-2427
FSC Code: 5331
MPN: 515705

5331-01-501-9726 (189344A1)

NIIN: 01-501-9726
In stock
NSN: 5331-01-501-9726
FSC Code: 5331
MPN: 189344A1

5331-01-501-6105 (189346A1)

NIIN: 01-501-6105
In stock
NSN: 5331-01-501-6105
FSC Code: 5331
MPN: 189346A1

5331-01-208-3771 (5154R1-9)

NIIN: 01-208-3771
In stock
NSN: 5331-01-208-3771
FSC Code: 5331
MPN: 5154R19

5331-00-508-0555 (51538-42)

NIIN: 00-508-0555
In stock
NSN: 5331-00-508-0555
FSC Code: 5331
MPN: 5153842

5331-00-882-8021 (515273-1)

NIIN: 00-882-8021
In stock
NSN: 5331-00-882-8021
FSC Code: 5331
MPN: 5152731

5331-01-236-0482 (5-152N304-75)

NIIN: 01-236-0482
In stock
NSN: 5331-01-236-0482
FSC Code: 5331
MPN: 5152N30475

5331-00-211-8430 (5-151S604-70)

NIIN: 00-211-8430
In stock
NSN: 5331-00-211-8430
FSC Code: 5331
MPN: 5151S60470

5331-01-230-1766 (5-151-L449-65)

NIIN: 01-230-1766
In stock
NSN: 5331-01-230-1766
FSC Code: 5331
MPN: 5151L44965

5331-01-424-3868 (18872TS)

NIIN: 01-424-3868
In stock
NSN: 5331-01-424-3868
FSC Code: 5331
MPN: 18872TS

5331-00-786-2329 (5-151-10011-10)

NIIN: 00-786-2329
In stock
NSN: 5331-00-786-2329
FSC Code: 5331
MPN: 51511001110

5331-01-287-2930 (5-148V747-75)

NIIN: 01-287-2930
In stock
NSN: 5331-01-287-2930
FSC Code: 5331
MPN: 5148V74775

5331-00-110-5486 (5-148)

NIIN: 00-110-5486
In stock
NSN: 5331-00-110-5486
FSC Code: 5331
MPN: 5148

5331-01-297-7429 (5147-029-A)

NIIN: 01-297-7429
In stock
NSN: 5331-01-297-7429
FSC Code: 5331
MPN: 5147029A

5331-01-298-4730 (5147-045-A)

NIIN: 01-298-4730
In stock
NSN: 5331-01-298-4730
FSC Code: 5331
MPN: 5147045A

5331-00-245-9206 (5-145N602-2)

NIIN: 00-245-9206
In stock
NSN: 5331-00-245-9206
FSC Code: 5331
MPN: 5145N6022

5331-00-570-0384 (5145-231)

NIIN: 00-570-0384
In stock
NSN: 5331-00-570-0384
FSC Code: 5331
MPN: 5145231

5331-00-559-5412 (5145-337)

NIIN: 00-559-5412
In stock
NSN: 5331-00-559-5412
FSC Code: 5331
MPN: 5145337

5331-01-073-0906 (5145-240-A)

NIIN: 01-073-0906
In stock
NSN: 5331-01-073-0906
FSC Code: 5331
MPN: 5145240A

5331-01-289-7747 (5145-258-A)

NIIN: 01-289-7747
In stock
NSN: 5331-01-289-7747
FSC Code: 5331
MPN: 5145258A

5331-01-272-0704 (5145-228-A)

NIIN: 01-272-0704
In stock
NSN: 5331-01-272-0704
FSC Code: 5331
MPN: 5145228A

5331-00-457-2759 (5145-171-A)

NIIN: 00-457-2759
In stock
NSN: 5331-00-457-2759
FSC Code: 5331
MPN: 5145171A

5331-01-146-4707 (5145-131)

NIIN: 01-146-4707
In stock
NSN: 5331-01-146-4707
FSC Code: 5331
MPN: 5145131

5331-00-251-4198 (5145-033-A)

NIIN: 00-251-4198
In stock
NSN: 5331-00-251-4198
FSC Code: 5331
MPN: 5145033A

5331-00-438-8591 (5145-163-A)

NIIN: 00-438-8591
In stock
NSN: 5331-00-438-8591
FSC Code: 5331
MPN: 5145163A

5331-00-411-0646 (5145-049-A)

NIIN: 00-411-0646
In stock
NSN: 5331-00-411-0646
FSC Code: 5331
MPN: 5145049A

5331-00-966-8696 (5145-136-A)

NIIN: 00-966-8696
In stock
NSN: 5331-00-966-8696
FSC Code: 5331
MPN: 5145136A

5331-00-239-1953 (5145-032)

NIIN: 00-239-1953
In stock
NSN: 5331-00-239-1953
FSC Code: 5331
MPN: 5145032

5331-00-966-8684 (5145-128-A)

NIIN: 00-966-8684
In stock
NSN: 5331-00-966-8684
FSC Code: 5331
MPN: 5145128A

5331-00-989-5700 (5145-036)

NIIN: 00-989-5700
In stock
NSN: 5331-00-989-5700
FSC Code: 5331
MPN: 5145036

5331-00-493-8047 (5145-024)

NIIN: 00-493-8047
In stock
NSN: 5331-00-493-8047
FSC Code: 5331
MPN: 5145024

5331-00-411-6504 (5145-030)

NIIN: 00-411-6504
In stock
NSN: 5331-00-411-6504
FSC Code: 5331
MPN: 5145030

5331-00-137-6699 (5145-026)

NIIN: 00-137-6699
In stock
NSN: 5331-00-137-6699
FSC Code: 5331
MPN: 5145026

5331-00-500-0853 (5145-029)

NIIN: 00-500-0853
In stock
NSN: 5331-00-500-0853
FSC Code: 5331
MPN: 5145029

5331-00-457-2760 (5145-028)

NIIN: 00-457-2760
In stock
NSN: 5331-00-457-2760
FSC Code: 5331
MPN: 5145028

5331-01-472-4594 (LL-H53-4865)

NIIN: 01-472-4594
In stock
NSN: 5331-01-472-4594
FSC Code: 5331
MPN: LLH534865