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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.

5331-01-383-3204 (9435-906)

NIIN: 01-383-3204
In stock
NSN: 5331-01-383-3204
FSC Code: 5331
MPN: 9435906

5331-01-371-5122 (943309-5)

NIIN: 01-371-5122
In stock
NSN: 5331-01-371-5122
FSC Code: 5331
MPN: 9433095

5331-01-387-7464 (943177-6)

NIIN: 01-387-7464
In stock
NSN: 5331-01-387-7464
FSC Code: 5331
MPN: 9431776

5331-01-387-8174 (942353-4)

NIIN: 01-387-8174
In stock
NSN: 5331-01-387-8174
FSC Code: 5331
MPN: 9423534

5331-01-392-9472 (94-15911)

NIIN: 01-392-9472
In stock
NSN: 5331-01-392-9472
FSC Code: 5331
MPN: 9415911

5331-01-543-2595 (AS568A-329)

NIIN: 01-543-2595
In stock
NSN: 5331-01-543-2595
FSC Code: 5331
MPN: AS568A329

5331-01-531-1756 (94115K322)

NIIN: 01-531-1756
In stock
NSN: 5331-01-531-1756
FSC Code: 5331
MPN: 94115K322

5331-01-545-8962 (94115K367)

NIIN: 01-545-8962
In stock
NSN: 5331-01-545-8962
FSC Code: 5331
MPN: 94115K367

5331-01-377-0623 (940-2260-000)

NIIN: 01-377-0623
In stock
NSN: 5331-01-377-0623
FSC Code: 5331
MPN: 9402260000

5331-00-599-0533 (MIL-PRF-1149D)

NIIN: 00-599-0533
In stock
NSN: 5331-00-599-0533
FSC Code: 5331
MPN: MILPRF1149D

5331-01-377-1478 (940-02260-000)

NIIN: 01-377-1478
In stock
NSN: 5331-01-377-1478
FSC Code: 5331
MPN: 94002260000

5331-00-990-2845 (MIL-PRF-1149)

NIIN: 00-990-2845
In stock
NSN: 5331-00-990-2845
FSC Code: 5331
MPN: MILPRF1149

5331-01-414-6606 (93J0038)

NIIN: 01-414-6606
In stock
NSN: 5331-01-414-6606
FSC Code: 5331
MPN: 93J0038

5331-01-422-4448 (93-D-149)

NIIN: 01-422-4448
In stock
NSN: 5331-01-422-4448
FSC Code: 5331
MPN: 93D149

5331-01-422-4384 (93-D-149)

NIIN: 01-422-4384
In stock
NSN: 5331-01-422-4384
FSC Code: 5331
MPN: 93D149

5331-01-572-5389 (9396K65)

NIIN: 01-572-5389
In stock
NSN: 5331-01-572-5389
FSC Code: 5331
MPN: 9396K65

5331-01-549-2448 (9396K142)

NIIN: 01-549-2448
In stock
NSN: 5331-01-549-2448
FSC Code: 5331
MPN: 9396K142

5331-01-227-5090 (MIL-P-83461/1-234)

NIIN: 01-227-5090
In stock
NSN: 5331-01-227-5090
FSC Code: 5331
MPN: MILP834611234

5331-01-185-2589 (MIL-P-83461/1-241)

NIIN: 01-185-2589
In stock
NSN: 5331-01-185-2589
FSC Code: 5331
MPN: MILP834611241

5331-01-335-8011 (MIL-P-83461/1-131)

NIIN: 01-335-8011
In stock
NSN: 5331-01-335-8011
FSC Code: 5331
MPN: MILP834611131

5331-01-334-7947 (MIL-P-83461/1-020)

NIIN: 01-334-7947
In stock
NSN: 5331-01-334-7947
FSC Code: 5331
MPN: MILP834611020

5331-01-335-8013 (MIL-P-83248/2-021)

NIIN: 01-335-8013
In stock
NSN: 5331-01-335-8013
FSC Code: 5331
MPN: MILP832482021

5331-00-827-6917 (MIL-P-5315)

NIIN: 00-827-6917
In stock
NSN: 5331-00-827-6917
FSC Code: 5331
MPN: MILP5315

5331-00-231-3220 (MILP5516CLASSB)

NIIN: 00-231-3220
In stock
NSN: 5331-00-231-3220
FSC Code: 5331
MPN: MILP5516CLASSB

5331-00-231-3233 (MILP5516CLASSB)

NIIN: 00-231-3233
In stock
NSN: 5331-00-231-3233
FSC Code: 5331
MPN: MILP5516CLASSB

5331-01-207-9385 (MIL-P-5315)

NIIN: 01-207-9385
In stock
NSN: 5331-01-207-9385
FSC Code: 5331
MPN: MILP5315

5331-00-801-3002 (MILP25732A)

NIIN: 00-801-3002
In stock
NSN: 5331-00-801-3002
FSC Code: 5331
MPN: MILP25732A

5331-00-827-6886 (MILP5315)

NIIN: 00-827-6886
In stock
NSN: 5331-00-827-6886
FSC Code: 5331
MPN: MILP5315

5331-00-171-8072 (MIL-P-25732C)

NIIN: 00-171-8072
In stock
NSN: 5331-00-171-8072
FSC Code: 5331
MPN: MILP25732C

5331-01-208-0300 (MIL-P-25732)

NIIN: 01-208-0300
In stock
NSN: 5331-01-208-0300
FSC Code: 5331
MPN: MILP25732

5331-00-959-7397 (MIL-P-25732)

NIIN: 00-959-7397
In stock
NSN: 5331-00-959-7397
FSC Code: 5331
MPN: MILP25732

5331-00-068-9527 (MILP25732)

NIIN: 00-068-9527
In stock
NSN: 5331-00-068-9527
FSC Code: 5331
MPN: MILP25732

5331-01-373-3345 (938273834U01)

NIIN: 01-373-3345
In stock
NSN: 5331-01-373-3345
FSC Code: 5331
MPN: 938273834U01

5331-15-149-2385 (938294511U01)

NIIN: 15-149-2385
In stock
NSN: 5331-15-149-2385
FSC Code: 5331
MPN: 938294511U01

5331-00-531-3309 (MILP18017)

NIIN: 00-531-3309
In stock
NSN: 5331-00-531-3309
FSC Code: 5331
MPN: MILP18017

5331-01-373-3348 (938334045U01)

NIIN: 01-373-3348
In stock
NSN: 5331-01-373-3348
FSC Code: 5331
MPN: 938334045U01

5331-01-373-3346 (938283758U01)

NIIN: 01-373-3346
In stock
NSN: 5331-01-373-3346
FSC Code: 5331
MPN: 938283758U01

5331-15-120-0803 (938256454U01)

NIIN: 15-120-0803
In stock
NSN: 5331-15-120-0803
FSC Code: 5331
MPN: 938256454U01

5331-01-373-4795 (938272913U01)

NIIN: 01-373-4795
In stock
NSN: 5331-01-373-4795
FSC Code: 5331
MPN: 938272913U01

5331-01-406-1700 (B2575-107.053)

NIIN: 01-406-1700
In stock
NSN: 5331-01-406-1700
FSC Code: 5331
MPN: B2575107053

5331-01-365-5781 (98064F91-ITEM)

NIIN: 01-365-5781
In stock
NSN: 5331-01-365-5781
FSC Code: 5331
MPN: 98064F91ITEM

5331-15-120-0802 (937749308U01)

NIIN: 15-120-0802
In stock
NSN: 5331-15-120-0802
FSC Code: 5331
MPN: 937749308U01

5331-01-472-9228 (9-372-102053)

NIIN: 01-472-9228
In stock
NSN: 5331-01-472-9228
FSC Code: 5331
MPN: 9372102053

5331-01-539-0225 (9365M41P117)

NIIN: 01-539-0225
In stock
NSN: 5331-01-539-0225
FSC Code: 5331
MPN: 9365M41P117

5331-01-475-6591 (9365M41P229)

NIIN: 01-475-6591
In stock
NSN: 5331-01-475-6591
FSC Code: 5331
MPN: 9365M41P229

5331-01-527-8853 (9365M41P122)

NIIN: 01-527-8853
In stock
NSN: 5331-01-527-8853
FSC Code: 5331
MPN: 9365M41P122

5331-00-892-1558 (MIL-G-22050)

NIIN: 00-892-1558
In stock
NSN: 5331-00-892-1558
FSC Code: 5331
MPN: MILG22050

5331-01-272-3328 (MIL-G-21610)

NIIN: 01-272-3328
In stock
NSN: 5331-01-272-3328
FSC Code: 5331
MPN: MILG21610