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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.

5331-00-912-4841 (MS29561-428)

NIIN: 00-912-4841
In stock
NSN: 5331-00-912-4841
FSC Code: 5331
MPN: MS29561428

5331-01-239-1269 (MS29561-431)

NIIN: 01-239-1269
In stock
NSN: 5331-01-239-1269
FSC Code: 5331
MPN: MS29561431

5331-00-846-7248 (MS29561-439)

NIIN: 00-846-7248
In stock
NSN: 5331-00-846-7248
FSC Code: 5331
MPN: MS29561439

5331-00-731-8966 (MS29561-436)

NIIN: 00-731-8966
In stock
NSN: 5331-00-731-8966
FSC Code: 5331
MPN: MS29561436

5331-00-914-1826 (MS29561-343)

NIIN: 00-914-1826
In stock
NSN: 5331-00-914-1826
FSC Code: 5331
MPN: MS29561343

5331-00-291-4836 (MS29561-333)

NIIN: 00-291-4836
In stock
NSN: 5331-00-291-4836
FSC Code: 5331
MPN: MS29561333

5331-01-074-1500 (MS29561-339)

NIIN: 01-074-1500
In stock
NSN: 5331-01-074-1500
FSC Code: 5331
MPN: MS29561339

5331-00-083-4879 (MS29561-270)

NIIN: 00-083-4879
In stock
NSN: 5331-00-083-4879
FSC Code: 5331
MPN: MS29561270

5331-00-580-5936 (MS29561-341)

NIIN: 00-580-5936
In stock
NSN: 5331-00-580-5936
FSC Code: 5331
MPN: MS29561341

5331-00-599-0921 (MS29561-335)

NIIN: 00-599-0921
In stock
NSN: 5331-00-599-0921
FSC Code: 5331
MPN: MS29561335

5331-00-866-0016 (MS29561-332)

NIIN: 00-866-0016
In stock
NSN: 5331-00-866-0016
FSC Code: 5331
MPN: MS29561332

5331-00-135-5082 (MS29561-338)

NIIN: 00-135-5082
In stock
NSN: 5331-00-135-5082
FSC Code: 5331
MPN: MS29561338

5331-00-905-3715 (MS29561-268)

NIIN: 00-905-3715
In stock
NSN: 5331-00-905-3715
FSC Code: 5331
MPN: MS29561268

5331-01-237-5561 (MS29561-262)

NIIN: 01-237-5561
In stock
NSN: 5331-01-237-5561
FSC Code: 5331
MPN: MS29561262

5331-00-835-2894 (MS29561-273)

NIIN: 00-835-2894
In stock
NSN: 5331-00-835-2894
FSC Code: 5331
MPN: MS29561273

5331-00-700-0639 (MS29561-272)

NIIN: 00-700-0639
In stock
NSN: 5331-00-700-0639
FSC Code: 5331
MPN: MS29561272

5331-00-057-6953 (MS29561-329)

NIIN: 00-057-6953
In stock
NSN: 5331-00-057-6953
FSC Code: 5331
MPN: MS29561329

5331-00-143-7095 (MS29561-326)

NIIN: 00-143-7095
In stock
NSN: 5331-00-143-7095
FSC Code: 5331
MPN: MS29561326

5331-00-725-4025 (MS29561-267)

NIIN: 00-725-4025
In stock
NSN: 5331-00-725-4025
FSC Code: 5331
MPN: MS29561267

5331-00-924-3902 (MS29561-269)

NIIN: 00-924-3902
In stock
NSN: 5331-00-924-3902
FSC Code: 5331
MPN: MS29561269

5331-00-726-1235 (MS29561-261)

NIIN: 00-726-1235
In stock
NSN: 5331-00-726-1235
FSC Code: 5331
MPN: MS29561261

5331-01-029-2349 (MS29561-211)

NIIN: 01-029-2349
In stock
NSN: 5331-01-029-2349
FSC Code: 5331
MPN: MS29561211

5331-01-136-8616 (MS29512-18)

NIIN: 01-136-8616
In stock
NSN: 5331-01-136-8616
FSC Code: 5331
MPN: MS2951218

5331-01-062-4467 (MS29512-28)

NIIN: 01-062-4467
In stock
NSN: 5331-01-062-4467
FSC Code: 5331
MPN: MS2951228

5331-01-193-1617 (MS29512-01)

NIIN: 01-193-1617
In stock
NSN: 5331-01-193-1617
FSC Code: 5331
MPN: MS2951201

5331-01-244-4015 (MS29512-09)

NIIN: 01-244-4015
In stock
NSN: 5331-01-244-4015
FSC Code: 5331
MPN: MS2951209

5331-00-931-6751 (MS28778-20)

NIIN: 00-931-6751
In stock
NSN: 5331-00-931-6751
FSC Code: 5331
MPN: MS2877820

5331-01-212-1294 (MS28775-472)

NIIN: 01-212-1294
In stock
NSN: 5331-01-212-1294
FSC Code: 5331
MPN: MS28775472

5331-01-183-4058 (MS28775-471)

NIIN: 01-183-4058
In stock
NSN: 5331-01-183-4058
FSC Code: 5331
MPN: MS28775471

5331-01-149-5964 (MS28775-469)

NIIN: 01-149-5964
In stock
NSN: 5331-01-149-5964
FSC Code: 5331
MPN: MS28775469

5331-01-458-9414 (A568-158-C90-90)

NIIN: 01-458-9414
In stock
NSN: 5331-01-458-9414
FSC Code: 5331
MPN: A568158C9090

5331-00-825-1066 (MS28775-457)

NIIN: 00-825-1066
In stock
NSN: 5331-00-825-1066
FSC Code: 5331
MPN: MS28775457

5331-01-286-1224 (MS28775-385)

NIIN: 01-286-1224
In stock
NSN: 5331-01-286-1224
FSC Code: 5331
MPN: MS28775385

5331-01-187-7681 (MS28775-379)

NIIN: 01-187-7681
In stock
NSN: 5331-01-187-7681
FSC Code: 5331
MPN: MS28775379

5331-01-090-9099 (MS28775-385)

NIIN: 01-090-9099
In stock
NSN: 5331-01-090-9099
FSC Code: 5331
MPN: MS28775385

5331-01-105-2654 (MS28775-431)

NIIN: 01-105-2654
In stock
NSN: 5331-01-105-2654
FSC Code: 5331
MPN: MS28775431

5331-01-082-2766 (MS28775-375)

NIIN: 01-082-2766
In stock
NSN: 5331-01-082-2766
FSC Code: 5331
MPN: MS28775375

5331-01-121-8094 (MS28775-374)

NIIN: 01-121-8094
In stock
NSN: 5331-01-121-8094
FSC Code: 5331
MPN: MS28775374

5331-01-142-4472 (MS28775-363)

NIIN: 01-142-4472
In stock
NSN: 5331-01-142-4472
FSC Code: 5331
MPN: MS28775363

5331-01-147-9798 (MS28775-356)

NIIN: 01-147-9798
In stock
NSN: 5331-01-147-9798
FSC Code: 5331
MPN: MS28775356

5331-01-317-4030 (MS28775-370)

NIIN: 01-317-4030
In stock
NSN: 5331-01-317-4030
FSC Code: 5331
MPN: MS28775370

5331-01-317-0089 (MS28775-362)

NIIN: 01-317-0089
In stock
NSN: 5331-01-317-0089
FSC Code: 5331
MPN: MS28775362

5331-01-209-0512 (MS28775-315)

NIIN: 01-209-0512
In stock
NSN: 5331-01-209-0512
FSC Code: 5331
MPN: MS28775315

5331-01-104-5944 (MS28775-319)

NIIN: 01-104-5944
In stock
NSN: 5331-01-104-5944
FSC Code: 5331
MPN: MS28775319

5331-01-139-4510 (MS28775-282)

NIIN: 01-139-4510
In stock
NSN: 5331-01-139-4510
FSC Code: 5331
MPN: MS28775282

5331-00-722-4976 (MS28775-245)

NIIN: 00-722-4976
In stock
NSN: 5331-00-722-4976
FSC Code: 5331
MPN: MS28775245

5331-01-126-1381 (MS28775-277)

NIIN: 01-126-1381
In stock
NSN: 5331-01-126-1381
FSC Code: 5331
MPN: MS28775277

5331-01-244-4016 (MS28775-245)

NIIN: 01-244-4016
In stock
NSN: 5331-01-244-4016
FSC Code: 5331
MPN: MS28775245