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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.

5331-01-407-5424 (MS9772-011)

NIIN: 01-407-5424
In stock
NSN: 5331-01-407-5424
FSC Code: 5331
MPN: MS9772011

5331-01-388-4084 (MS9770-116)

NIIN: 01-388-4084
In stock
NSN: 5331-01-388-4084
FSC Code: 5331
MPN: MS9770116

5331-01-433-5391 (MS9386-262)

NIIN: 01-433-5391
In stock
NSN: 5331-01-433-5391
FSC Code: 5331
MPN: MS9386262

5331-01-433-5343 (MS9386-272)

NIIN: 01-433-5343
In stock
NSN: 5331-01-433-5343
FSC Code: 5331
MPN: MS9386272

5331-01-482-4584 (SAE-AS9385)

NIIN: 01-482-4584
In stock
NSN: 5331-01-482-4584
FSC Code: 5331
MPN: SAEAS9385

5331-01-433-5338 (MS9386-282)

NIIN: 01-433-5338
In stock
NSN: 5331-01-433-5338
FSC Code: 5331
MPN: MS9386282

5331-01-446-0439 (MS9386-382)

NIIN: 01-446-0439
In stock
NSN: 5331-01-446-0439
FSC Code: 5331
MPN: MS9386382

5331-01-433-5333 (MS9386-270)

NIIN: 01-433-5333
In stock
NSN: 5331-01-433-5333
FSC Code: 5331
MPN: MS9386270

5331-01-446-0474 (MS9386-263)

NIIN: 01-446-0474
In stock
NSN: 5331-01-446-0474
FSC Code: 5331
MPN: MS9386263

5331-01-433-5389 (MS9386-388)

NIIN: 01-433-5389
In stock
NSN: 5331-01-433-5389
FSC Code: 5331
MPN: MS9386388

5331-01-439-0613 (MS9386-257)

NIIN: 01-439-0613
In stock
NSN: 5331-01-439-0613
FSC Code: 5331
MPN: MS9386257

5331-01-383-2670 (MS9386-172)

NIIN: 01-383-2670
In stock
NSN: 5331-01-383-2670
FSC Code: 5331
MPN: MS9386172

5331-01-358-1902 (MS9386-109)

NIIN: 01-358-1902
In stock
NSN: 5331-01-358-1902
FSC Code: 5331
MPN: MS9386109

5331-01-460-4786 (MS9386-167)

NIIN: 01-460-4786
In stock
NSN: 5331-01-460-4786
FSC Code: 5331
MPN: MS9386167

5331-01-433-5342 (MS9386-276)

NIIN: 01-433-5342
In stock
NSN: 5331-01-433-5342
FSC Code: 5331
MPN: MS9386276

5331-01-433-5392 (MS9386-284)

NIIN: 01-433-5392
In stock
NSN: 5331-01-433-5392
FSC Code: 5331
MPN: MS9386284

5331-01-560-8630 (MS9388-127)

NIIN: 01-560-8630
In stock
NSN: 5331-01-560-8630
FSC Code: 5331
MPN: MS9388127

5331-01-433-5327 (MS9386-168)

NIIN: 01-433-5327
In stock
NSN: 5331-01-433-5327
FSC Code: 5331
MPN: MS9386168

5331-01-446-0437 (MS9386-246)

NIIN: 01-446-0437
In stock
NSN: 5331-01-446-0437
FSC Code: 5331
MPN: MS9386246

5331-01-478-5066 (MS9386-139)

NIIN: 01-478-5066
In stock
NSN: 5331-01-478-5066
FSC Code: 5331
MPN: MS9386139

5331-01-433-5396 (MS9386-278)

NIIN: 01-433-5396
In stock
NSN: 5331-01-433-5396
FSC Code: 5331
MPN: MS9386278

5331-01-355-2708 (SAE-AS9385)

NIIN: 01-355-2708
In stock
NSN: 5331-01-355-2708
FSC Code: 5331
MPN: SAEAS9385

5331-01-350-2908 (MS9386-159)

NIIN: 01-350-2908
In stock
NSN: 5331-01-350-2908
FSC Code: 5331
MPN: MS9386159

5331-01-354-0240 (MS9386-173)

NIIN: 01-354-0240
In stock
NSN: 5331-01-354-0240
FSC Code: 5331
MPN: MS9386173

5331-01-474-3166 (MS9386-127)

NIIN: 01-474-3166
In stock
NSN: 5331-01-474-3166
FSC Code: 5331
MPN: MS9386127

5331-01-355-8801 (MS9386-150)

NIIN: 01-355-8801
In stock
NSN: 5331-01-355-8801
FSC Code: 5331
MPN: MS9386150

5331-01-355-8328 (MS9386-107)

NIIN: 01-355-8328
In stock
NSN: 5331-01-355-8328
FSC Code: 5331
MPN: MS9386107

5331-01-433-5445 (MS9386-162)

NIIN: 01-433-5445
In stock
NSN: 5331-01-433-5445
FSC Code: 5331
MPN: MS9386162

5331-01-354-0238 (MS9386-031)

NIIN: 01-354-0238
In stock
NSN: 5331-01-354-0238
FSC Code: 5331
MPN: MS9386031

5331-01-354-0237 (MS9386-035)

NIIN: 01-354-0237
In stock
NSN: 5331-01-354-0237
FSC Code: 5331
MPN: MS9386035

5331-01-537-4762 (MS9241-330)

NIIN: 01-537-4762
In stock
NSN: 5331-01-537-4762
FSC Code: 5331
MPN: MS9241330

5331-01-483-3843 (MS9241-380)

NIIN: 01-483-3843
In stock
NSN: 5331-01-483-3843
FSC Code: 5331
MPN: MS9241380

5331-01-483-3842 (MS9241-280)

NIIN: 01-483-3842
In stock
NSN: 5331-01-483-3842
FSC Code: 5331
MPN: MS9241280

5331-01-473-0563 (MS9241-263)

NIIN: 01-473-0563
In stock
NSN: 5331-01-473-0563
FSC Code: 5331
MPN: MS9241263

5331-01-537-4769 (MS9241-432)

NIIN: 01-537-4769
In stock
NSN: 5331-01-537-4769
FSC Code: 5331
MPN: MS9241432

5331-01-413-2734 (MS9068-261)

NIIN: 01-413-2734
In stock
NSN: 5331-01-413-2734
FSC Code: 5331
MPN: MS9068261

5331-01-388-3989 (MS9021D-018)

NIIN: 01-388-3989
In stock
NSN: 5331-01-388-3989
FSC Code: 5331
MPN: MS9021D018

5331-01-388-3985 (MS9021D-242)

NIIN: 01-388-3985
In stock
NSN: 5331-01-388-3985
FSC Code: 5331
MPN: MS9021D242

5331-01-388-3986 (MS9021D-016)

NIIN: 01-388-3986
In stock
NSN: 5331-01-388-3986
FSC Code: 5331
MPN: MS9021D016

5331-01-487-1483 (MS3461/1-259)

NIIN: 01-487-1483
In stock
NSN: 5331-01-487-1483
FSC Code: 5331
MPN: MS34611259

5331-01-398-1781 (MS3393-3)

NIIN: 01-398-1781
In stock
NSN: 5331-01-398-1781
FSC Code: 5331
MPN: MS33933

5331-01-502-6465 (MS3248/2-902)

NIIN: 01-502-6465
In stock
NSN: 5331-01-502-6465
FSC Code: 5331
MPN: MS32482902

5331-01-514-0950 (MS29513-156)

NIIN: 01-514-0950
In stock
NSN: 5331-01-514-0950
FSC Code: 5331
MPN: MS29513156

5331-01-544-5720 (MS29513-906)

NIIN: 01-544-5720
In stock
NSN: 5331-01-544-5720
FSC Code: 5331
MPN: MS29513906

5331-01-516-6746 (MS295513-112)

NIIN: 01-516-6746
In stock
NSN: 5331-01-516-6746
FSC Code: 5331
MPN: MS295513112

5331-01-549-9350 (MS29561-171)

NIIN: 01-549-9350
In stock
NSN: 5331-01-549-9350
FSC Code: 5331
MPN: MS29561171

5331-01-569-4633 (MS29512-906)

NIIN: 01-569-4633
In stock
NSN: 5331-01-569-4633
FSC Code: 5331
MPN: MS29512906

5331-01-417-1223 (MS29561-119)

NIIN: 01-417-1223
In stock
NSN: 5331-01-417-1223
FSC Code: 5331
MPN: MS29561119