Skip to content

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.

5331-00-129-9335 (00510262)

NIIN: 00-129-9335
In stock
NSN: 5331-00-129-9335
FSC Code: 5331
MPN: 00510262

5331-01-113-9863 (005-11307)

NIIN: 01-113-9863
In stock
NSN: 5331-01-113-9863
FSC Code: 5331
MPN: 00511307

5331-00-649-9129 (00510J)

NIIN: 00-649-9129
In stock
NSN: 5331-00-649-9129
FSC Code: 5331
MPN: 00510J

5331-00-248-3836 (00512E)

NIIN: 00-248-3836
In stock
NSN: 5331-00-248-3836
FSC Code: 5331
MPN: 00512E

5331-01-219-7563 (00512E)

NIIN: 01-219-7563
In stock
NSN: 5331-01-219-7563
FSC Code: 5331
MPN: 00512E

5331-00-248-3846 (00514)

NIIN: 00-248-3846
In stock
NSN: 5331-00-248-3846
FSC Code: 5331
MPN: 00514

5331-00-826-3751 (005-1467)

NIIN: 00-826-3751
In stock
NSN: 5331-00-826-3751
FSC Code: 5331
MPN: 0051467

5331-00-755-4948 (00515078)

NIIN: 00-755-4948
In stock
NSN: 5331-00-755-4948
FSC Code: 5331
MPN: 00515078

5331-00-248-3842 (00517)

NIIN: 00-248-3842
In stock
NSN: 5331-00-248-3842
FSC Code: 5331
MPN: 00517

5331-01-276-0546 (00518-0001)

NIIN: 01-276-0546
In stock
NSN: 5331-01-276-0546
FSC Code: 5331
MPN: 005180001

5331-00-248-3848 (00518)

NIIN: 00-248-3848
In stock
NSN: 5331-00-248-3848
FSC Code: 5331
MPN: 00518

5331-01-284-7888 (00518B)

NIIN: 01-284-7888
In stock
NSN: 5331-01-284-7888
FSC Code: 5331
MPN: 00518B

5331-01-147-0746 (00520)

NIIN: 01-147-0746
In stock
NSN: 5331-01-147-0746
FSC Code: 5331
MPN: 00520

5331-01-214-7720 (00520861)

NIIN: 01-214-7720
In stock
NSN: 5331-01-214-7720
FSC Code: 5331
MPN: 00520861

5331-01-210-4797 (005212)

NIIN: 01-210-4797
In stock
NSN: 5331-01-210-4797
FSC Code: 5331
MPN: 005212

5331-01-252-3117 (005216)

NIIN: 01-252-3117
In stock
NSN: 5331-01-252-3117
FSC Code: 5331
MPN: 005216

5331-01-210-4799 (005218)

NIIN: 01-210-4799
In stock
NSN: 5331-01-210-4799
FSC Code: 5331
MPN: 005218

5331-01-181-4936 (005231.53.63)

NIIN: 01-181-4936
In stock
NSN: 5331-01-181-4936
FSC Code: 5331
MPN: 0052315363

5331-00-250-0236 (00524K)

NIIN: 00-250-0236
In stock
NSN: 5331-00-250-0236
FSC Code: 5331
MPN: 00524K

5331-00-248-3837 (00529)

NIIN: 00-248-3837
In stock
NSN: 5331-00-248-3837
FSC Code: 5331
MPN: 00529

5331-01-242-9231 (00530.10049)

NIIN: 01-242-9231
In stock
NSN: 5331-01-242-9231
FSC Code: 5331
MPN: 0053010049

5331-01-274-3102 (005-303)

NIIN: 01-274-3102
In stock
NSN: 5331-01-274-3102
FSC Code: 5331
MPN: 005303

5331-01-178-1253 (0053149)

NIIN: 01-178-1253
In stock
NSN: 5331-01-178-1253
FSC Code: 5331
MPN: 0053149

5331-01-311-2671 (0053202)

NIIN: 01-311-2671
In stock
NSN: 5331-01-311-2671
FSC Code: 5331
MPN: 0053202

5331-00-248-3847 (00534J)

NIIN: 00-248-3847
In stock
NSN: 5331-00-248-3847
FSC Code: 5331
MPN: 00534J

5331-00-250-0228 (00538)

NIIN: 00-250-0228
In stock
NSN: 5331-00-250-0228
FSC Code: 5331
MPN: 00538

5331-01-296-6449 (0054002)

NIIN: 01-296-6449
In stock
NSN: 5331-01-296-6449
FSC Code: 5331
MPN: 0054002

5331-01-068-9810 (005418321/120)

NIIN: 01-068-9810
In stock
NSN: 5331-01-068-9810
FSC Code: 5331
MPN: 005418321120

5331-01-286-5953 (00542-0002/18750-0001)

NIIN: 01-286-5953
In stock
NSN: 5331-01-286-5953
FSC Code: 5331
MPN: 005420002187500001

5331-00-579-1021 (00542B)

NIIN: 00-579-1021
In stock
NSN: 5331-00-579-1021
FSC Code: 5331
MPN: 00542B

5331-01-210-4800 (005439)

NIIN: 01-210-4800
In stock
NSN: 5331-01-210-4800
FSC Code: 5331
MPN: 005439

5331-00-587-7791 (005-450)

NIIN: 00-587-7791
In stock
NSN: 5331-00-587-7791
FSC Code: 5331
MPN: 005450

5331-00-265-1078 (00546C)

NIIN: 00-265-1078
In stock
NSN: 5331-00-265-1078
FSC Code: 5331
MPN: 00546C

5331-01-309-4267 (0054478)

NIIN: 01-309-4267
In stock
NSN: 5331-01-309-4267
FSC Code: 5331
MPN: 0054478

5331-00-127-2849 (00-55-065)

NIIN: 00-127-2849
In stock
NSN: 5331-00-127-2849
FSC Code: 5331
MPN: 0055065

5331-00-252-6049 (00556B)

NIIN: 00-252-6049
In stock
NSN: 5331-00-252-6049
FSC Code: 5331
MPN: 00556B

5331-01-309-9760 (0055962)

NIIN: 01-309-9760
In stock
NSN: 5331-01-309-9760
FSC Code: 5331
MPN: 0055962

5331-01-309-4268 (0056333)

NIIN: 01-309-4268
In stock
NSN: 5331-01-309-4268
FSC Code: 5331
MPN: 0056333

5331-01-270-8311 (005675-09-913)

NIIN: 01-270-8311
In stock
NSN: 5331-01-270-8311
FSC Code: 5331
MPN: 00567509913

5331-01-274-8074 (005675-596-966)

NIIN: 01-274-8074
In stock
NSN: 5331-01-274-8074
FSC Code: 5331
MPN: 005675596966

5331-00-127-2522 (00569)

NIIN: 00-127-2522
In stock
NSN: 5331-00-127-2522
FSC Code: 5331
MPN: 00569

5331-01-308-5852 (0057109)

NIIN: 01-308-5852
In stock
NSN: 5331-01-308-5852
FSC Code: 5331
MPN: 0057109

5331-00-250-0226 (00571A)

NIIN: 00-250-0226
In stock
NSN: 5331-00-250-0226
FSC Code: 5331
MPN: 00571A

5331-01-308-5853 (0057174)

NIIN: 01-308-5853
In stock
NSN: 5331-01-308-5853
FSC Code: 5331
MPN: 0057174

5331-01-309-6930 (0057141)

NIIN: 01-309-6930
In stock
NSN: 5331-01-309-6930
FSC Code: 5331
MPN: 0057141

5331-01-250-5261 (0057228)

NIIN: 01-250-5261
In stock
NSN: 5331-01-250-5261
FSC Code: 5331
MPN: 0057228

5331-00-265-1075 (00577H)

NIIN: 00-265-1075
In stock
NSN: 5331-00-265-1075
FSC Code: 5331
MPN: 00577H

5331-01-308-5851 (0057976)

NIIN: 01-308-5851
In stock
NSN: 5331-01-308-5851
FSC Code: 5331
MPN: 0057976