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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.

5331-01-479-4502 (450A3446)

NIIN: 01-479-4502
In stock
NSN: 5331-01-479-4502
FSC Code: 5331
MPN: 450A3446

5331-00-139-7182 (8824-9)

NIIN: 00-139-7182
In stock
NSN: 5331-00-139-7182
FSC Code: 5331
MPN: 88249

5331-00-003-6899 (882328-4)

NIIN: 00-003-6899
In stock
NSN: 5331-00-003-6899
FSC Code: 5331
MPN: 8823284

5331-01-390-2900 (45011558-02)

NIIN: 01-390-2900
In stock
NSN: 5331-01-390-2900
FSC Code: 5331
MPN: 4501155802

5331-01-308-9030 (881239-2)

NIIN: 01-308-9030
In stock
NSN: 5331-01-308-9030
FSC Code: 5331
MPN: 8812392

5331-00-646-8978 (881208-4)

NIIN: 00-646-8978
In stock
NSN: 5331-00-646-8978
FSC Code: 5331
MPN: 8812084

5331-00-592-3406 (87Y10146)

NIIN: 00-592-3406
In stock
NSN: 5331-00-592-3406
FSC Code: 5331
MPN: 87Y10146

5331-01-052-4463 (879951-1)

NIIN: 01-052-4463
In stock
NSN: 5331-01-052-4463
FSC Code: 5331
MPN: 8799511

5331-01-191-8040 (878L145)

NIIN: 01-191-8040
In stock
NSN: 5331-01-191-8040
FSC Code: 5331
MPN: 878L145

5331-01-335-9263 (878448C91)

NIIN: 01-335-9263
In stock
NSN: 5331-01-335-9263
FSC Code: 5331
MPN: 878448C91

5331-01-335-9264 (878447C1)

NIIN: 01-335-9264
In stock
NSN: 5331-01-335-9264
FSC Code: 5331
MPN: 878447C1

5331-00-237-6648 (878068C1)

NIIN: 00-237-6648
In stock
NSN: 5331-00-237-6648
FSC Code: 5331
MPN: 878068C1

5331-00-579-7643 (87795-1)

NIIN: 00-579-7643
In stock
NSN: 5331-00-579-7643
FSC Code: 5331
MPN: 877951

5331-01-454-3077 (449-7310)

NIIN: 01-454-3077
In stock
NSN: 5331-01-454-3077
FSC Code: 5331
MPN: 4497310

5331-01-311-5958 (877-51)

NIIN: 01-311-5958
In stock
NSN: 5331-01-311-5958
FSC Code: 5331
MPN: 87751

5331-01-275-1863 (8772B)

NIIN: 01-275-1863
In stock
NSN: 5331-01-275-1863
FSC Code: 5331
MPN: 8772B

5331-00-115-3831 (8766B)

NIIN: 00-115-3831
In stock
NSN: 5331-00-115-3831
FSC Code: 5331
MPN: 8766B

5331-00-004-1582 (876102C1)

NIIN: 00-004-1582
In stock
NSN: 5331-00-004-1582
FSC Code: 5331
MPN: 876102C1

5331-01-252-5107 (876101C1)

NIIN: 01-252-5107
In stock
NSN: 5331-01-252-5107
FSC Code: 5331
MPN: 876101C1

5331-01-133-8648 (876110C1)

NIIN: 01-133-8648
In stock
NSN: 5331-01-133-8648
FSC Code: 5331
MPN: 876110C1

5331-01-076-6167 (876106C1)

NIIN: 01-076-6167
In stock
NSN: 5331-01-076-6167
FSC Code: 5331
MPN: 876106C1

5331-01-164-8302 (874E953)

NIIN: 01-164-8302
In stock
NSN: 5331-01-164-8302
FSC Code: 5331
MPN: 874E953

5331-01-360-0941 (4472-354-024)

NIIN: 01-360-0941
In stock
NSN: 5331-01-360-0941
FSC Code: 5331
MPN: 4472354024

5331-01-550-7486 (446GC)

NIIN: 01-550-7486
In stock
NSN: 5331-01-550-7486
FSC Code: 5331
MPN: 446GC

5331-01-446-7909 (80-228-N90)

NIIN: 01-446-7909
In stock
NSN: 5331-01-446-7909
FSC Code: 5331
MPN: 80228N90

5331-01-551-5870 (446GC1108)

NIIN: 01-551-5870
In stock
NSN: 5331-01-551-5870
FSC Code: 5331
MPN: 446GC1108

5331-00-599-0874 (87321-1)

NIIN: 00-599-0874
In stock
NSN: 5331-00-599-0874
FSC Code: 5331
MPN: 873211

5331-01-215-6748 (8731PC38)

NIIN: 01-215-6748
In stock
NSN: 5331-01-215-6748
FSC Code: 5331
MPN: 8731PC38

5331-01-298-6938 (8720-6868)

NIIN: 01-298-6938
In stock
NSN: 5331-01-298-6938
FSC Code: 5331
MPN: 87206868

5331-01-315-3757 (871-60836-2-914-0)

NIIN: 01-315-3757
In stock
NSN: 5331-01-315-3757
FSC Code: 5331
MPN: 8716083629140

5331-01-304-7789 (87159PN22)

NIIN: 01-304-7789
In stock
NSN: 5331-01-304-7789
FSC Code: 5331
MPN: 87159PN22

5331-01-304-7790 (87159PN23)

NIIN: 01-304-7790
In stock
NSN: 5331-01-304-7790
FSC Code: 5331
MPN: 87159PN23

5331-00-839-1586 (87-158P2)

NIIN: 00-839-1586
In stock
NSN: 5331-00-839-1586
FSC Code: 5331
MPN: 87158P2

5331-01-304-7788 (87159PN21)

NIIN: 01-304-7788
In stock
NSN: 5331-01-304-7788
FSC Code: 5331
MPN: 87159PN21

5331-00-853-3819 (87-158P6)

NIIN: 00-853-3819
In stock
NSN: 5331-00-853-3819
FSC Code: 5331
MPN: 87158P6

5331-01-239-3289 (8712828-01)

NIIN: 01-239-3289
In stock
NSN: 5331-01-239-3289
FSC Code: 5331
MPN: 871282801

5331-25-150-2566 (5ST441224-13)

NIIN: 25-150-2566
In stock
NSN: 5331-25-150-2566
FSC Code: 5331
MPN: 5ST44122413

5331-25-150-2563 (5ST441224-5)

NIIN: 25-150-2563
In stock
NSN: 5331-25-150-2563
FSC Code: 5331
MPN: 5ST4412245

5331-25-150-2565 (5ST441224-9)

NIIN: 25-150-2565
In stock
NSN: 5331-25-150-2565
FSC Code: 5331
MPN: 5ST4412249

5331-01-311-5951 (87095-S94)

NIIN: 01-311-5951
In stock
NSN: 5331-01-311-5951
FSC Code: 5331
MPN: 87095S94

5331-00-223-1261 (87055S94)

NIIN: 00-223-1261
In stock
NSN: 5331-00-223-1261
FSC Code: 5331
MPN: 87055S94

5331-00-491-7666 (87055S92)

NIIN: 00-491-7666
In stock
NSN: 5331-00-491-7666
FSC Code: 5331
MPN: 87055S92

5331-00-485-0049 (87053S94)

NIIN: 00-485-0049
In stock
NSN: 5331-00-485-0049
FSC Code: 5331
MPN: 87053S94

5331-00-485-0052 (87051S94)

NIIN: 00-485-0052
In stock
NSN: 5331-00-485-0052
FSC Code: 5331
MPN: 87051S94

5331-01-311-5952 (87043-S94)

NIIN: 01-311-5952
In stock
NSN: 5331-01-311-5952
FSC Code: 5331
MPN: 87043S94

5331-00-491-7655 (87036S92)

NIIN: 00-491-7655
In stock
NSN: 5331-00-491-7655
FSC Code: 5331
MPN: 87036S92

5331-00-485-0050 (87035S94)

NIIN: 00-485-0050
In stock
NSN: 5331-00-485-0050
FSC Code: 5331
MPN: 87035S94

5331-00-997-9019 (87034S94)

NIIN: 00-997-9019
In stock
NSN: 5331-00-997-9019
FSC Code: 5331
MPN: 87034S94