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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.

5331-00-741-4742 (25704-281250-05-0)

NIIN: 00-741-4742
In stock
NSN: 5331-00-741-4742
FSC Code: 5331
MPN: 25704281250050

5331-01-506-4745 (0-3-3-2)

NIIN: 01-506-4745
In stock
NSN: 5331-01-506-4745
FSC Code: 5331
MPN: 0332

5331-00-422-0144 (2572536-3)

NIIN: 00-422-0144
In stock
NSN: 5331-00-422-0144
FSC Code: 5331
MPN: 25725363

5331-00-418-2151 (257437-5)

NIIN: 00-418-2151
In stock
NSN: 5331-00-418-2151
FSC Code: 5331
MPN: 2574375

5331-01-474-2401 (033-6039)

NIIN: 01-474-2401
In stock
NSN: 5331-01-474-2401
FSC Code: 5331
MPN: 0336039

5331-01-494-4282 (033-5853)

NIIN: 01-494-4282
In stock
NSN: 5331-01-494-4282
FSC Code: 5331
MPN: 0335853

5331-01-470-3092 (033-6027)

NIIN: 01-470-3092
In stock
NSN: 5331-01-470-3092
FSC Code: 5331
MPN: 0336027

5331-01-506-7134 (033-6042)

NIIN: 01-506-7134
In stock
NSN: 5331-01-506-7134
FSC Code: 5331
MPN: 0336042

5331-01-282-3256 (2574737-10)

NIIN: 01-282-3256
In stock
NSN: 5331-01-282-3256
FSC Code: 5331
MPN: 257473710

5331-01-494-7819 (033-6042)

NIIN: 01-494-7819
In stock
NSN: 5331-01-494-7819
FSC Code: 5331
MPN: 0336042

5331-01-474-2399 (033-6041)

NIIN: 01-474-2399
In stock
NSN: 5331-01-474-2399
FSC Code: 5331
MPN: 0336041

5331-01-282-3257 (2574737-11)

NIIN: 01-282-3257
In stock
NSN: 5331-01-282-3257
FSC Code: 5331
MPN: 257473711

5331-01-528-4358 (033-6043)

NIIN: 01-528-4358
In stock
NSN: 5331-01-528-4358
FSC Code: 5331
MPN: 0336043

5331-00-418-2148 (2574737-11)

NIIN: 00-418-2148
In stock
NSN: 5331-00-418-2148
FSC Code: 5331
MPN: 257473711

5331-01-436-2590 (157039-114)

NIIN: 01-436-2590
In stock
NSN: 5331-01-436-2590
FSC Code: 5331
MPN: 157039114

5331-01-474-1785 (033-6033)

NIIN: 01-474-1785
In stock
NSN: 5331-01-474-1785
FSC Code: 5331
MPN: 0336033

5331-01-282-3248 (2574737-2)

NIIN: 01-282-3248
In stock
NSN: 5331-01-282-3248
FSC Code: 5331
MPN: 25747372

5331-00-418-2147 (2574737-10)

NIIN: 00-418-2147
In stock
NSN: 5331-00-418-2147
FSC Code: 5331
MPN: 257473710

5331-01-282-3251 (2574737-5)

NIIN: 01-282-3251
In stock
NSN: 5331-01-282-3251
FSC Code: 5331
MPN: 25747375

5331-01-282-3249 (2574737-3)

NIIN: 01-282-3249
In stock
NSN: 5331-01-282-3249
FSC Code: 5331
MPN: 25747373

5331-01-351-5124 (033-70)

NIIN: 01-351-5124
In stock
NSN: 5331-01-351-5124
FSC Code: 5331
MPN: 03370

5331-00-418-2149 (2574737-3)

NIIN: 00-418-2149
In stock
NSN: 5331-00-418-2149
FSC Code: 5331
MPN: 25747373

5331-01-282-3250 (2574737-4)

NIIN: 01-282-3250
In stock
NSN: 5331-01-282-3250
FSC Code: 5331
MPN: 25747374

5331-01-282-3252 (2574737-6)

NIIN: 01-282-3252
In stock
NSN: 5331-01-282-3252
FSC Code: 5331
MPN: 25747376

5331-01-282-3253 (2574737-7)

NIIN: 01-282-3253
In stock
NSN: 5331-01-282-3253
FSC Code: 5331
MPN: 25747377

5331-01-282-3255 (2574737-9)

NIIN: 01-282-3255
In stock
NSN: 5331-01-282-3255
FSC Code: 5331
MPN: 25747379

5331-01-282-3254 (2574737-8)

NIIN: 01-282-3254
In stock
NSN: 5331-01-282-3254
FSC Code: 5331
MPN: 25747378

5331-00-781-9912 (2574N011)

NIIN: 00-781-9912
In stock
NSN: 5331-00-781-9912
FSC Code: 5331
MPN: 2574N011

5331-00-111-3725 (2575-3-46)

NIIN: 00-111-3725
In stock
NSN: 5331-00-111-3725
FSC Code: 5331
MPN: 2575346

5331-00-110-8804 (2575-2-46)

NIIN: 00-110-8804
In stock
NSN: 5331-00-110-8804
FSC Code: 5331
MPN: 2575246

5331-00-890-9992 (257642R1)

NIIN: 00-890-9992
In stock
NSN: 5331-00-890-9992
FSC Code: 5331
MPN: 257642R1

5331-01-527-5643 (034.003.01)

NIIN: 01-527-5643
In stock
NSN: 5331-01-527-5643
FSC Code: 5331
MPN: 03400301

5331-01-331-9970 (25781-042-0000)

NIIN: 01-331-9970
In stock
NSN: 5331-01-331-9970
FSC Code: 5331
MPN: 257810420000

5331-01-300-2571 (25-785-6)

NIIN: 01-300-2571
In stock
NSN: 5331-01-300-2571
FSC Code: 5331
MPN: 257856

5331-01-364-2018 (034-014-00)

NIIN: 01-364-2018
In stock
NSN: 5331-01-364-2018
FSC Code: 5331
MPN: 03401400

5331-14-398-1642 (03400C0000A60C7)

NIIN: 14-398-1642
In stock
NSN: 5331-14-398-1642
FSC Code: 5331
MPN: 03400C0000A60C7

5331-01-424-6579 (034025V)

NIIN: 01-424-6579
In stock
NSN: 5331-01-424-6579
FSC Code: 5331
MPN: 034025V

5331-01-530-3088 (LL-H58-3934)

NIIN: 01-530-3088
In stock
NSN: 5331-01-530-3088
FSC Code: 5331
MPN: LLH583934

5331-01-447-5930 (034040V)

NIIN: 01-447-5930
In stock
NSN: 5331-01-447-5930
FSC Code: 5331
MPN: 034040V

5331-01-351-6998 (099-00200-68)

NIIN: 01-351-6998
In stock
NSN: 5331-01-351-6998
FSC Code: 5331
MPN: 0990020068

5331-01-432-3961 (03-4151-0004)

NIIN: 01-432-3961
In stock
NSN: 5331-01-432-3961
FSC Code: 5331
MPN: 0341510004

5331-01-380-7899 (474-1064-034)

NIIN: 01-380-7899
In stock
NSN: 5331-01-380-7899
FSC Code: 5331
MPN: 4741064034

5331-01-487-4313 (034921-01)

NIIN: 01-487-4313
In stock
NSN: 5331-01-487-4313
FSC Code: 5331
MPN: 03492101

5331-01-185-8544 (258038-1)

NIIN: 01-185-8544
In stock
NSN: 5331-01-185-8544
FSC Code: 5331
MPN: 2580381

5331-01-527-5645 (035.048.01)

NIIN: 01-527-5645
In stock
NSN: 5331-01-527-5645
FSC Code: 5331
MPN: 03504801

5331-00-819-1514 (2581-020)

NIIN: 00-819-1514
In stock
NSN: 5331-00-819-1514
FSC Code: 5331
MPN: 2581020

5331-00-819-1516 (2581-013)

NIIN: 00-819-1516
In stock
NSN: 5331-00-819-1516
FSC Code: 5331
MPN: 2581013

5331-00-819-1515 (2581-024)

NIIN: 00-819-1515
In stock
NSN: 5331-00-819-1515
FSC Code: 5331
MPN: 2581024