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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.

5331-01-422-2179 (A0254-00)

NIIN: 01-422-2179
In stock
NSN: 5331-01-422-2179
FSC Code: 5331
MPN: A025400

5331-01-420-3536 (A0254-00)

NIIN: 01-420-3536
In stock
NSN: 5331-01-420-3536
FSC Code: 5331
MPN: A025400

5331-01-572-8291 (A0249970848)

NIIN: 01-572-8291
In stock
NSN: 5331-01-572-8291
FSC Code: 5331
MPN: A0249970848

5331-01-420-6062 (A0225-00)

NIIN: 01-420-6062
In stock
NSN: 5331-01-420-6062
FSC Code: 5331
MPN: A022500

5331-01-445-7747 (A023103)

NIIN: 01-445-7747
In stock
NSN: 5331-01-445-7747
FSC Code: 5331
MPN: A023103

5331-01-420-8766 (A0225-00)

NIIN: 01-420-8766
In stock
NSN: 5331-01-420-8766
FSC Code: 5331
MPN: A022500

5331-00-367-9086 (MILR2765-256ES)

NIIN: 00-367-9086
In stock
NSN: 5331-00-367-9086
FSC Code: 5331
MPN: MILR2765256ES

5331-00-377-6328 (MILR2765-204ES)

NIIN: 00-377-6328
In stock
NSN: 5331-00-377-6328
FSC Code: 5331
MPN: MILR2765204ES

5331-00-369-5925 (MILR2765-906ES)

NIIN: 00-369-5925
In stock
NSN: 5331-00-369-5925
FSC Code: 5331
MPN: MILR2765906ES

5331-00-245-6767 (MILR2765-215ES)

NIIN: 00-245-6767
In stock
NSN: 5331-00-245-6767
FSC Code: 5331
MPN: MILR2765215ES

5331-00-008-5919 (MILR2765ES)

NIIN: 00-008-5919
In stock
NSN: 5331-00-008-5919
FSC Code: 5331
MPN: MILR2765ES

5331-00-367-9027 (MILR2765-219ES)

NIIN: 00-367-9027
In stock
NSN: 5331-00-367-9027
FSC Code: 5331
MPN: MILR2765219ES

5331-00-369-5922 (MILR2765-905ES)

NIIN: 00-369-5922
In stock
NSN: 5331-00-369-5922
FSC Code: 5331
MPN: MILR2765905ES

5331-00-519-7703 (MILR2765-227ES)

NIIN: 00-519-7703
In stock
NSN: 5331-00-519-7703
FSC Code: 5331
MPN: MILR2765227ES

5331-00-377-4394 (MILR2765-164ES)

NIIN: 00-377-4394
In stock
NSN: 5331-00-377-4394
FSC Code: 5331
MPN: MILR2765164ES

5331-00-367-8933 (MILR2765-209ES)

NIIN: 00-367-8933
In stock
NSN: 5331-00-367-8933
FSC Code: 5331
MPN: MILR2765209ES

5331-00-373-3444 (MILR2765-169ES)

NIIN: 00-373-3444
In stock
NSN: 5331-00-373-3444
FSC Code: 5331
MPN: MILR2765169ES

5331-00-377-4509 (MILR2765-131ES)

NIIN: 00-377-4509
In stock
NSN: 5331-00-377-4509
FSC Code: 5331
MPN: MILR2765131ES

5331-00-377-4389 (MILR2765-161ES)

NIIN: 00-377-4389
In stock
NSN: 5331-00-377-4389
FSC Code: 5331
MPN: MILR2765161ES

5331-00-373-3428 (MILR2765-163ES)

NIIN: 00-373-3428
In stock
NSN: 5331-00-373-3428
FSC Code: 5331
MPN: MILR2765163ES

5331-00-240-3922 (MILR2765-030ES)

NIIN: 00-240-3922
In stock
NSN: 5331-00-240-3922
FSC Code: 5331
MPN: MILR2765030ES

5331-00-377-4364 (MILR2765-154ES)

NIIN: 00-377-4364
In stock
NSN: 5331-00-377-4364
FSC Code: 5331
MPN: MILR2765154ES

5331-00-377-4625 (MILR2765-140ES)

NIIN: 00-377-4625
In stock
NSN: 5331-00-377-4625
FSC Code: 5331
MPN: MILR2765140ES

5331-00-373-3416 (MILR2765-155ES)

NIIN: 00-373-3416
In stock
NSN: 5331-00-373-3416
FSC Code: 5331
MPN: MILR2765155ES

5331-00-922-1736 (MILR2765-013ES)

NIIN: 00-922-1736
In stock
NSN: 5331-00-922-1736
FSC Code: 5331
MPN: MILR2765013ES

5331-00-382-8135 (MILR2765-024ES)

NIIN: 00-382-8135
In stock
NSN: 5331-00-382-8135
FSC Code: 5331
MPN: MILR2765024ES

5331-00-373-3410 (MILR2765-150ES)

NIIN: 00-373-3410
In stock
NSN: 5331-00-373-3410
FSC Code: 5331
MPN: MILR2765150ES

5331-00-377-4422 (MILR2765-112ES)

NIIN: 00-377-4422
In stock
NSN: 5331-00-377-4422
FSC Code: 5331
MPN: MILR2765112ES

5331-00-377-4947 (MILR2765-014ES)

NIIN: 00-377-4947
In stock
NSN: 5331-00-377-4947
FSC Code: 5331
MPN: MILR2765014ES

5331-00-382-8130 (MILR2765-019ES)

NIIN: 00-382-8130
In stock
NSN: 5331-00-382-8130
FSC Code: 5331
MPN: MILR2765019ES

5331-00-382-8128 (MILR2765-011ES)

NIIN: 00-382-8128
In stock
NSN: 5331-00-382-8128
FSC Code: 5331
MPN: MILR2765011ES

5331-00-377-5326 (MILR2765-015ES)

NIIN: 00-377-5326
In stock
NSN: 5331-00-377-5326
FSC Code: 5331
MPN: MILR2765015ES

5331-00-541-9052 (MILR2765-014ES)

NIIN: 00-541-9052
In stock
NSN: 5331-00-541-9052
FSC Code: 5331
MPN: MILR2765014ES

5331-01-414-3045 (A01081A14)

NIIN: 01-414-3045
In stock
NSN: 5331-01-414-3045
FSC Code: 5331
MPN: A01081A14

5331-99-654-3615 (A005-C00102M)

NIIN: 99-654-3615
In stock
NSN: 5331-99-654-3615
FSC Code: 5331
MPN: A005C00102M

5331-01-549-8786 (A5419970745)

NIIN: 01-549-8786
In stock
NSN: 5331-01-549-8786
FSC Code: 5331
MPN: A5419970745

5331-01-505-7249 (9X-0796)

NIIN: 01-505-7249
In stock
NSN: 5331-01-505-7249
FSC Code: 5331
MPN: 9X0796

5331-01-470-3115 (9X-7557)

NIIN: 01-470-3115
In stock
NSN: 5331-01-470-3115
FSC Code: 5331
MPN: 9X7557

5331-01-422-0706 (HZTL417729P1)

NIIN: 01-422-0706
In stock
NSN: 5331-01-422-0706
FSC Code: 5331
MPN: HZTL417729P1

5331-01-483-9829 (9X-7735)

NIIN: 01-483-9829
In stock
NSN: 5331-01-483-9829
FSC Code: 5331
MPN: 9X7735

5331-01-474-2081 (9X-7566)

NIIN: 01-474-2081
In stock
NSN: 5331-01-474-2081
FSC Code: 5331
MPN: 9X7566

5331-01-455-3923 (9X7371)

NIIN: 01-455-3923
In stock
NSN: 5331-01-455-3923
FSC Code: 5331
MPN: 9X7371

5331-01-536-9814 (9X-7737)

NIIN: 01-536-9814
In stock
NSN: 5331-01-536-9814
FSC Code: 5331
MPN: 9X7737

5331-01-470-3085 (9X-7712)

NIIN: 01-470-3085
In stock
NSN: 5331-01-470-3085
FSC Code: 5331
MPN: 9X7712

5331-01-439-2618 (9X-7743)

NIIN: 01-439-2618
In stock
NSN: 5331-01-439-2618
FSC Code: 5331
MPN: 9X7743

5331-01-529-8128 (9X-7418)

NIIN: 01-529-8128
In stock
NSN: 5331-01-529-8128
FSC Code: 5331
MPN: 9X7418

5331-01-503-7830 (9X-7419)

NIIN: 01-503-7830
In stock
NSN: 5331-01-503-7830
FSC Code: 5331
MPN: 9X7419

5331-01-412-1455 (9X-7688)

NIIN: 01-412-1455
In stock
NSN: 5331-01-412-1455
FSC Code: 5331
MPN: 9X7688