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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.

5331-00-585-7272 (LS4565-6)

NIIN: 00-585-7272
In stock
NSN: 5331-00-585-7272
FSC Code: 5331
MPN: LS45656

5331-00-585-7270 (LS4628-12)

NIIN: 00-585-7270
In stock
NSN: 5331-00-585-7270
FSC Code: 5331
MPN: LS462812

5331-01-071-3998 (LS4565-113)

NIIN: 01-071-3998
In stock
NSN: 5331-01-071-3998
FSC Code: 5331
MPN: LS4565113

5331-01-509-2400 (850000101-R11-118)

NIIN: 01-509-2400
In stock
NSN: 5331-01-509-2400
FSC Code: 5331
MPN: 850000101R11118

5331-12-352-8668 (850.197.4)

NIIN: 12-352-8668
In stock
NSN: 5331-12-352-8668
FSC Code: 5331
MPN: 8501974

5331-12-340-8798 (850.013.4)

NIIN: 12-340-8798
In stock
NSN: 5331-12-340-8798
FSC Code: 5331
MPN: 8500134

5331-12-331-1432 (850.004.4)

NIIN: 12-331-1432
In stock
NSN: 5331-12-331-1432
FSC Code: 5331
MPN: 8500044

5331-12-324-8453 (850.089.4)

NIIN: 12-324-8453
In stock
NSN: 5331-12-324-8453
FSC Code: 5331
MPN: 8500894

5331-12-351-8645 (8699970920)

NIIN: 12-351-8645
In stock
NSN: 5331-12-351-8645
FSC Code: 5331
MPN: 8699970920

5331-12-331-1434 (850.064.4)

NIIN: 12-331-1434
In stock
NSN: 5331-12-331-1434
FSC Code: 5331
MPN: 8500644

5331-12-331-1433 (850.065.4)

NIIN: 12-331-1433
In stock
NSN: 5331-12-331-1433
FSC Code: 5331
MPN: 8500654

5331-12-331-1437 (850.010.4)

NIIN: 12-331-1437
In stock
NSN: 5331-12-331-1437
FSC Code: 5331
MPN: 8500104

5331-12-331-1435 (850.021.4)

NIIN: 12-331-1435
In stock
NSN: 5331-12-331-1435
FSC Code: 5331
MPN: 8500214

5331-12-340-8786 (850.011.4)

NIIN: 12-340-8786
In stock
NSN: 5331-12-340-8786
FSC Code: 5331
MPN: 8500114

5331-01-442-5362 (8499-1)

NIIN: 01-442-5362
In stock
NSN: 5331-01-442-5362
FSC Code: 5331
MPN: 84991

5331-01-327-5507 (LS35340-2)

NIIN: 01-327-5507
In stock
NSN: 5331-01-327-5507
FSC Code: 5331
MPN: LS353402

5331-01-237-0734 (LS35056-015)

NIIN: 01-237-0734
In stock
NSN: 5331-01-237-0734
FSC Code: 5331
MPN: LS35056015

5331-01-236-1730 (LS35056-014)

NIIN: 01-236-1730
In stock
NSN: 5331-01-236-1730
FSC Code: 5331
MPN: LS35056014

5331-00-152-5150 (LS12906-186)

NIIN: 00-152-5150
In stock
NSN: 5331-00-152-5150
FSC Code: 5331
MPN: LS12906186

5331-01-445-1448 (84-71029C)

NIIN: 01-445-1448
In stock
NSN: 5331-01-445-1448
FSC Code: 5331
MPN: 8471029C

5331-00-982-3623 (LS10160-278)

NIIN: 00-982-3623
In stock
NSN: 5331-00-982-3623
FSC Code: 5331
MPN: LS10160278

5331-00-616-5909 (LS10155-14)

NIIN: 00-616-5909
In stock
NSN: 5331-00-616-5909
FSC Code: 5331
MPN: LS1015514

5331-01-296-2075 (LR011115-10)

NIIN: 01-296-2075
In stock
NSN: 5331-01-296-2075
FSC Code: 5331
MPN: LR01111510

5331-01-292-6343 (LR-125042-12)

NIIN: 01-292-6343
In stock
NSN: 5331-01-292-6343
FSC Code: 5331
MPN: LR12504212

5331-01-295-5735 (LR011115-14)

NIIN: 01-295-5735
In stock
NSN: 5331-01-295-5735
FSC Code: 5331
MPN: LR01111514

5331-01-432-1403 (8-457)

NIIN: 01-432-1403
In stock
NSN: 5331-01-432-1403
FSC Code: 5331
MPN: 8457

5331-01-455-4832 (845-7016077-X-079)

NIIN: 01-455-4832
In stock
NSN: 5331-01-455-4832
FSC Code: 5331
MPN: 8457016077X079

5331-01-385-1830 (845-6343753PC3)

NIIN: 01-385-1830
In stock
NSN: 5331-01-385-1830
FSC Code: 5331
MPN: 8456343753PC3

5331-01-504-1572 (845-6556398PC66)

NIIN: 01-504-1572
In stock
NSN: 5331-01-504-1572
FSC Code: 5331
MPN: 8456556398PC66

5331-01-372-3611 (845-6343753PC11)

NIIN: 01-372-3611
In stock
NSN: 5331-01-372-3611
FSC Code: 5331
MPN: 8456343753PC11

5331-00-225-0172 (LP1309)

NIIN: 00-225-0172
In stock
NSN: 5331-00-225-0172
FSC Code: 5331
MPN: LP1309

5331-01-230-1595 (LP1002)

NIIN: 01-230-1595
In stock
NSN: 5331-01-230-1595
FSC Code: 5331
MPN: LP1002

5331-01-151-5556 (L-NB252251-SMCT03)

NIIN: 01-151-5556
In stock
NSN: 5331-01-151-5556
FSC Code: 5331
MPN: LNB252251SMCT03

5331-01-298-4742 (LM615)

NIIN: 01-298-4742
In stock
NSN: 5331-01-298-4742
FSC Code: 5331
MPN: LM615

5331-00-786-0410 (LM4-28)

NIIN: 00-786-0410
In stock
NSN: 5331-00-786-0410
FSC Code: 5331
MPN: LM428

5331-01-505-5176 (853-09952-000)

NIIN: 01-505-5176
In stock
NSN: 5331-01-505-5176
FSC Code: 5331
MPN: 85309952000

5331-01-542-2513 (843-C-8044)

NIIN: 01-542-2513
In stock
NSN: 5331-01-542-2513
FSC Code: 5331
MPN: 843C8044

5331-01-511-2660 (853-9997-000)

NIIN: 01-511-2660
In stock
NSN: 5331-01-511-2660
FSC Code: 5331
MPN: 8539997000

5331-01-511-2736 (853-9999-000)

NIIN: 01-511-2736
In stock
NSN: 5331-01-511-2736
FSC Code: 5331
MPN: 8539999000

5331-01-542-2508 (843-C-8044)

NIIN: 01-542-2508
In stock
NSN: 5331-01-542-2508
FSC Code: 5331
MPN: 843C8044

5331-01-511-2681 (853-9998-000)

NIIN: 01-511-2681
In stock
NSN: 5331-01-511-2681
FSC Code: 5331
MPN: 8539998000

5331-01-234-4762 (LM3110301PC25)

NIIN: 01-234-4762
In stock
NSN: 5331-01-234-4762
FSC Code: 5331
MPN: LM3110301PC25

5331-01-271-2049 (LL-HX5-4422)

NIIN: 01-271-2049
In stock
NSN: 5331-01-271-2049
FSC Code: 5331
MPN: LLHX54422

5331-01-268-3663 (LL-HX5-4401)

NIIN: 01-268-3663
In stock
NSN: 5331-01-268-3663
FSC Code: 5331
MPN: LLHX54401

5331-01-268-5586 (LL-HX5-4403)

NIIN: 01-268-5586
In stock
NSN: 5331-01-268-5586
FSC Code: 5331
MPN: LLHX54403

5331-01-266-3293 (LL-HX5-4453)

NIIN: 01-266-3293
In stock
NSN: 5331-01-266-3293
FSC Code: 5331
MPN: LLHX54453

5331-01-254-1387 (LL-HX5-1453)

NIIN: 01-254-1387
In stock
NSN: 5331-01-254-1387
FSC Code: 5331
MPN: LLHX51453

5331-01-268-5587 (LL-HX5-4418)

NIIN: 01-268-5587
In stock
NSN: 5331-01-268-5587
FSC Code: 5331
MPN: LLHX54418