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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.

5331-01-612-5435 (9626944)

NIIN: 01-612-5435
In stock
NSN: 5331-01-612-5435
FSC Code: 5331
MPN: 9626944

5331-01-612-5035 (SD012200-397)

NIIN: 01-612-5035
In stock
NSN: 5331-01-612-5035
FSC Code: 5331
MPN: SD012200397

5331-01-612-4362 (564800)

NIIN: 01-612-4362
In stock
NSN: 5331-01-612-4362
FSC Code: 5331
MPN: 564800

5331-01-612-4079 (9452K125)

NIIN: 01-612-4079
In stock
NSN: 5331-01-612-4079
FSC Code: 5331
MPN: 9452K125

5331-01-612-2520 (ATV-618-TR PG 53 KEY 37)

NIIN: 01-612-2520
In stock
NSN: 5331-01-612-2520
FSC Code: 5331
MPN: ATV618TRPG53KEY37

5331-01-612-2498 (ATV-618-TR PG 60 KEY 19)

NIIN: 01-612-2498
In stock
NSN: 5331-01-612-2498
FSC Code: 5331
MPN: ATV618TRPG60KEY19

5331-01-611-9913 (10017125)

NIIN: 01-611-9913
In stock
NSN: 5331-01-611-9913
FSC Code: 5331
MPN: 10017125

5331-01-612-8298 (AS3582-908)

NIIN: 01-612-8298
In stock
NSN: 5331-01-612-8298
FSC Code: 5331
MPN: AS3582908

5331-01-612-7769 (385310151)

NIIN: 01-612-7769
In stock
NSN: 5331-01-612-7769
FSC Code: 5331
MPN: 385310151

5331-01-612-7065 (13495908-4)

NIIN: 01-612-7065
In stock
NSN: 5331-01-612-7065
FSC Code: 5331
MPN: 134959084

5331-01-612-5959 (2256M75P01)

NIIN: 01-612-5959
In stock
NSN: 5331-01-612-5959
FSC Code: 5331
MPN: 2256M75P01

5331-01-612-7683 (123-255-5)

NIIN: 01-612-7683
In stock
NSN: 5331-01-612-7683
FSC Code: 5331
MPN: 1232555

5331-01-612-2491 (ATV-618-TR PG 60 KEY 21)

NIIN: 01-612-2491
In stock
NSN: 5331-01-612-2491
FSC Code: 5331
MPN: ATV618TRPG60KEY21

5331-01-612-0587 (4400483-2320)

NIIN: 01-612-0587
In stock
NSN: 5331-01-612-0587
FSC Code: 5331
MPN: 44004832320

5331-01-611-9702 (560.101.360)

NIIN: 01-611-9702
In stock
NSN: 5331-01-611-9702
FSC Code: 5331
MPN: 560101360

5331-01-612-5749 (SD012200-396)

NIIN: 01-612-5749
In stock
NSN: 5331-01-612-5749
FSC Code: 5331
MPN: SD012200396

5331-01-612-2525 (ATV-618-TR PG 53 KEY 22)

NIIN: 01-612-2525
In stock
NSN: 5331-01-612-2525
FSC Code: 5331
MPN: ATV618TRPG53KEY22

5331-01-612-2463 (13029375)

NIIN: 01-612-2463
In stock
NSN: 5331-01-612-2463
FSC Code: 5331
MPN: 13029375

5331-01-612-0498 (OR-128BN90)

NIIN: 01-612-0498
In stock
NSN: 5331-01-612-0498
FSC Code: 5331
MPN: OR128BN90

5331-01-611-7465 (1352803)

NIIN: 01-611-7465
In stock
NSN: 5331-01-611-7465
FSC Code: 5331
MPN: 1352803

5331-01-612-3730 (MS29775-012)

NIIN: 01-612-3730
In stock
NSN: 5331-01-612-3730
FSC Code: 5331
MPN: MS29775012

5331-01-612-3258 (ATV-618-TR PG 50 KEY 17)

NIIN: 01-612-3258
In stock
NSN: 5331-01-612-3258
FSC Code: 5331
MPN: ATV618TRPG50KEY17

5331-01-612-2911 (NAS1611-387A)

NIIN: 01-612-2911
In stock
NSN: 5331-01-612-2911
FSC Code: 5331
MPN: NAS1611387A

5331-01-612-2508 (ATV-618-TR PG 58 KEY 15)

NIIN: 01-612-2508
In stock
NSN: 5331-01-612-2508
FSC Code: 5331
MPN: ATV618TRPG58KEY15

5331-01-612-1698 (6019324)

NIIN: 01-612-1698
In stock
NSN: 5331-01-612-1698
FSC Code: 5331
MPN: 6019324

5331-01-611-9354 (0200-001-223)

NIIN: 01-611-9354
In stock
NSN: 5331-01-611-9354
FSC Code: 5331
MPN: 0200001223

5331-01-612-5744 (SD012200-394)

NIIN: 01-612-5744
In stock
NSN: 5331-01-612-5744
FSC Code: 5331
MPN: SD012200394

5331-01-611-7450 (1752043)

NIIN: 01-611-7450
In stock
NSN: 5331-01-611-7450
FSC Code: 5331
MPN: 1752043

5331-01-612-2531 (ATV-618-TR PG 53 KEY 17)

NIIN: 01-612-2531
In stock
NSN: 5331-01-612-2531
FSC Code: 5331
MPN: ATV618TRPG53KEY17

5331-01-612-2513 (ATV-618-TR PG 58 KEY 12)

NIIN: 01-612-2513
In stock
NSN: 5331-01-612-2513
FSC Code: 5331
MPN: ATV618TRPG58KEY12

5331-01-612-1930 (332/D9499)

NIIN: 01-612-1930
In stock
NSN: 5331-01-612-1930
FSC Code: 5331
MPN: 332D9499

5331-01-612-1323 (12490921)

NIIN: 01-612-1323
In stock
NSN: 5331-01-612-1323
FSC Code: 5331
MPN: 12490921

5331-01-612-0784 (M25988/2-338)

NIIN: 01-612-0784
In stock
NSN: 5331-01-612-0784
FSC Code: 5331
MPN: M259882338

5331-01-612-4804 (AS3582-174)

NIIN: 01-612-4804
In stock
NSN: 5331-01-612-4804
FSC Code: 5331
MPN: AS3582174

5331-01-611-8459 (040695)

NIIN: 01-611-8459
In stock
NSN: 5331-01-611-8459
FSC Code: 5331
MPN: 040695

5331-01-611-7299 (1738056)

NIIN: 01-611-7299
In stock
NSN: 5331-01-611-7299
FSC Code: 5331
MPN: 1738056

5331-01-611-5507 (660121961)

NIIN: 01-611-5507
In stock
NSN: 5331-01-611-5507
FSC Code: 5331
MPN: 660121961

5331-01-611-4153 (652515368)

NIIN: 01-611-4153
In stock
NSN: 5331-01-611-4153
FSC Code: 5331
MPN: 652515368

5331-01-612-1392 (332/E6131)

NIIN: 01-612-1392
In stock
NSN: 5331-01-612-1392
FSC Code: 5331
MPN: 332E6131

5331-01-611-9420 (818518-014)

NIIN: 01-611-9420
In stock
NSN: 5331-01-611-9420
FSC Code: 5331
MPN: 818518014

5331-01-611-4838 (1531758-88)

NIIN: 01-611-4838
In stock
NSN: 5331-01-611-4838
FSC Code: 5331
MPN: 153175888

5331-01-611-3537 (652707068)

NIIN: 01-611-3537
In stock
NSN: 5331-01-611-3537
FSC Code: 5331
MPN: 652707068

5331-01-612-1314 (570120)

NIIN: 01-612-1314
In stock
NSN: 5331-01-612-1314
FSC Code: 5331
MPN: 570120

5331-01-612-1045 (E1MDL2SM-REV1211 ITEM NO. 20)

NIIN: 01-612-1045
In stock
NSN: 5331-01-612-1045
FSC Code: 5331
MPN: E1MDL2SMREV1211ITEMNO20

5331-01-612-0398 (83084)

NIIN: 01-612-0398
In stock
NSN: 5331-01-612-0398
FSC Code: 5331
MPN: 83084

5331-01-612-0034 (135-6950)

NIIN: 01-612-0034
In stock
NSN: 5331-01-612-0034
FSC Code: 5331
MPN: 1356950

5331-01-611-7448 (605343-400)

NIIN: 01-611-7448
In stock
NSN: 5331-01-611-7448
FSC Code: 5331
MPN: 605343400

5331-01-611-4723 (9452K27)

NIIN: 01-611-4723
In stock
NSN: 5331-01-611-4723
FSC Code: 5331
MPN: 9452K27