Skip to content

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.

5331-01-505-5508 (172-4844)

NIIN: 01-505-5508
In stock
NSN: 5331-01-505-5508
FSC Code: 5331
MPN: 1724844

5331-00-585-4478 (50001-210-0020)

NIIN: 00-585-4478
In stock
NSN: 5331-00-585-4478
FSC Code: 5331
MPN: 500012100020

5331-00-210-6239 (50001-210-0010)

NIIN: 00-210-6239
In stock
NSN: 5331-00-210-6239
FSC Code: 5331
MPN: 500012100010

5331-00-579-7335 (50001-113-0020)

NIIN: 00-579-7335
In stock
NSN: 5331-00-579-7335
FSC Code: 5331
MPN: 500011130020

5331-01-129-9671 (500001-0136-0000)

NIIN: 01-129-9671
In stock
NSN: 5331-01-129-9671
FSC Code: 5331
MPN: 50000101360000

5331-01-502-9022 (17218165-0)

NIIN: 01-502-9022
In stock
NSN: 5331-01-502-9022
FSC Code: 5331
MPN: 172181650

5331-01-480-3653 (17218109-0)

NIIN: 01-480-3653
In stock
NSN: 5331-01-480-3653
FSC Code: 5331
MPN: 172181090

5331-01-502-9020 (17218040-0)

NIIN: 01-502-9020
In stock
NSN: 5331-01-502-9020
FSC Code: 5331
MPN: 172180400

5331-01-484-3466 (17218105-0)

NIIN: 01-484-3466
In stock
NSN: 5331-01-484-3466
FSC Code: 5331
MPN: 172181050

5331-00-003-0642 (50-00001-029)

NIIN: 00-003-0642
In stock
NSN: 5331-00-003-0642
FSC Code: 5331
MPN: 5000001029

5331-01-351-2748 (17210-7)

NIIN: 01-351-2748
In stock
NSN: 5331-01-351-2748
FSC Code: 5331
MPN: 172107

5331-01-185-6993 (5000-000-0014-01)

NIIN: 01-185-6993
In stock
NSN: 5331-01-185-6993
FSC Code: 5331
MPN: 5000000001401

5331-00-752-8609 (500000-0011-002)

NIIN: 00-752-8609
In stock
NSN: 5331-00-752-8609
FSC Code: 5331
MPN: 5000000011002

5331-01-006-3935 (500000-0026-0002)

NIIN: 01-006-3935
In stock
NSN: 5331-01-006-3935
FSC Code: 5331
MPN: 50000000260002

5331-01-497-8569 (3-920C873-70)

NIIN: 01-497-8569
In stock
NSN: 5331-01-497-8569
FSC Code: 5331
MPN: 3920C87370

5331-01-497-8682 (711510-3S-C87370)

NIIN: 01-497-8682
In stock
NSN: 5331-01-497-8682
FSC Code: 5331
MPN: 7115103SC87370

5331-01-148-7487 (5.400-070)

NIIN: 01-148-7487
In stock
NSN: 5331-01-148-7487
FSC Code: 5331
MPN: 5400070

5331-01-497-8578 (17-2-0693-11)

NIIN: 01-497-8578
In stock
NSN: 5331-01-497-8578
FSC Code: 5331
MPN: 172069311

5331-01-497-8670 (17-2-0693-14)

NIIN: 01-497-8670
In stock
NSN: 5331-01-497-8670
FSC Code: 5331
MPN: 172069314

5331-01-148-7488 (5.875-070)

NIIN: 01-148-7488
In stock
NSN: 5331-01-148-7488
FSC Code: 5331
MPN: 5875070

5331-01-334-4221 (5.489X.070X40S)

NIIN: 01-334-4221
In stock
NSN: 5331-01-334-4221
FSC Code: 5331
MPN: 5489X070X40S

5331-01-245-4098 (5.0-51-24-3)

NIIN: 01-245-4098
In stock
NSN: 5331-01-245-4098
FSC Code: 5331
MPN: 5051243

5331-01-335-6920 (4W-9033)

NIIN: 01-335-6920
In stock
NSN: 5331-01-335-6920
FSC Code: 5331
MPN: 4W9033

5331-01-298-4734 (4V6721)

NIIN: 01-298-4734
In stock
NSN: 5331-01-298-4734
FSC Code: 5331
MPN: 4V6721

5331-01-159-8369 (4V2444)

NIIN: 01-159-8369
In stock
NSN: 5331-01-159-8369
FSC Code: 5331
MPN: 4V2444

5331-01-333-5197 (4T0959)

NIIN: 01-333-5197
In stock
NSN: 5331-01-333-5197
FSC Code: 5331
MPN: 4T0959

5331-00-895-7795 (4SC1037)

NIIN: 00-895-7795
In stock
NSN: 5331-00-895-7795
FSC Code: 5331
MPN: 4SC1037

5331-00-895-7835 (4SC1034)

NIIN: 00-895-7835
In stock
NSN: 5331-00-895-7835
FSC Code: 5331
MPN: 4SC1034

5331-01-298-4160 (4PS0N-S)

NIIN: 01-298-4160
In stock
NSN: 5331-01-298-4160
FSC Code: 5331
MPN: 4PS0NS

5331-00-471-1023 (4P33148-101B)

NIIN: 00-471-1023
In stock
NSN: 5331-00-471-1023
FSC Code: 5331
MPN: 4P33148101B

5331-00-471-1024 (4P33148-103B)

NIIN: 00-471-1024
In stock
NSN: 5331-00-471-1024
FSC Code: 5331
MPN: 4P33148103B

5331-01-566-5198 (171021-4)

NIIN: 01-566-5198
In stock
NSN: 5331-01-566-5198
FSC Code: 5331
MPN: 1710214

5331-01-535-5601 (171021-1)

NIIN: 01-535-5601
In stock
NSN: 5331-01-535-5601
FSC Code: 5331
MPN: 1710211

5331-01-566-5195 (171021-3)

NIIN: 01-566-5195
In stock
NSN: 5331-01-566-5195
FSC Code: 5331
MPN: 1710213

5331-01-386-5847 (171009-4)

NIIN: 01-386-5847
In stock
NSN: 5331-01-386-5847
FSC Code: 5331
MPN: 1710094

5331-01-398-0321 (171003-20)

NIIN: 01-398-0321
In stock
NSN: 5331-01-398-0321
FSC Code: 5331
MPN: 17100320

5331-01-117-4074 (4O314-50)

NIIN: 01-117-4074
In stock
NSN: 5331-01-117-4074
FSC Code: 5331
MPN: 4O31450

5331-00-580-1651 (4NE20726)

NIIN: 00-580-1651
In stock
NSN: 5331-00-580-1651
FSC Code: 5331
MPN: 4NE20726

5331-01-343-2777 (170X048-70FS)

NIIN: 01-343-2777
In stock
NSN: 5331-01-343-2777
FSC Code: 5331
MPN: 170X04870FS

5331-01-239-5082 (4M842A11)

NIIN: 01-239-5082
In stock
NSN: 5331-01-239-5082
FSC Code: 5331
MPN: 4M842A11

5331-00-851-9020 (4M6975)

NIIN: 00-851-9020
In stock
NSN: 5331-00-851-9020
FSC Code: 5331
MPN: 4M6975

5331-00-928-9480 (4M424A10PC9)

NIIN: 00-928-9480
In stock
NSN: 5331-00-928-9480
FSC Code: 5331
MPN: 4M424A10PC9

5331-01-449-3303 (170441-1)

NIIN: 01-449-3303
In stock
NSN: 5331-01-449-3303
FSC Code: 5331
MPN: 1704411

5331-00-904-0335 (4M189)

NIIN: 00-904-0335
In stock
NSN: 5331-00-904-0335
FSC Code: 5331
MPN: 4M189

5331-00-756-8552 (4M0661)

NIIN: 00-756-8552
In stock
NSN: 5331-00-756-8552
FSC Code: 5331
MPN: 4M0661

5331-01-437-9103 (17-033)

NIIN: 01-437-9103
In stock
NSN: 5331-01-437-9103
FSC Code: 5331
MPN: 17033

5331-00-074-3773 (4L-8337)

NIIN: 00-074-3773
In stock
NSN: 5331-00-074-3773
FSC Code: 5331
MPN: 4L8337

5331-99-522-2873 (H947-526-8837)

NIIN: 99-522-2873
In stock
NSN: 5331-99-522-2873
FSC Code: 5331
MPN: H9475268837