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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.

5331-01-510-9961 (SIZE-015)

NIIN: 01-510-9961
In stock
NSN: 5331-01-510-9961
FSC Code: 5331
MPN: SIZE015

5331-01-510-9964 (SIZE-017)

NIIN: 01-510-9964
In stock
NSN: 5331-01-510-9964
FSC Code: 5331
MPN: SIZE017

5331-01-436-5775 (SERIES)

NIIN: 01-436-5775
In stock
NSN: 5331-01-436-5775
FSC Code: 5331
MPN: SERIES

5331-01-342-5432 (SD-73X9)

NIIN: 01-342-5432
In stock
NSN: 5331-01-342-5432
FSC Code: 5331
MPN: SD73X9

5331-01-562-8418 (ST0720300R3C-6)

NIIN: 01-562-8418
In stock
NSN: 5331-01-562-8418
FSC Code: 5331
MPN: ST0720300R3C6

5331-01-542-3903 (ST053015BT11TS-21)

NIIN: 01-542-3903
In stock
NSN: 5331-01-542-3903
FSC Code: 5331
MPN: ST053015BT11TS21

5331-01-542-3888 (ST053015BT11TS-19)

NIIN: 01-542-3888
In stock
NSN: 5331-01-542-3888
FSC Code: 5331
MPN: ST053015BT11TS19

5331-01-360-0113 (ST051015BF11A-6)

NIIN: 01-360-0113
In stock
NSN: 5331-01-360-0113
FSC Code: 5331
MPN: ST051015BF11A6

5331-01-418-8566 (SC-8938/5-02)

NIIN: 01-418-8566
In stock
NSN: 5331-01-418-8566
FSC Code: 5331
MPN: SC8938502

5331-01-418-8572 (SC-8938/5-03)

NIIN: 01-418-8572
In stock
NSN: 5331-01-418-8572
FSC Code: 5331
MPN: SC8938503

5331-01-415-8265 (SC110496)

NIIN: 01-415-8265
In stock
NSN: 5331-01-415-8265
FSC Code: 5331
MPN: SC110496

5331-01-377-9444 (SB-25-F)

NIIN: 01-377-9444
In stock
NSN: 5331-01-377-9444
FSC Code: 5331
MPN: SB25F

5331-01-346-5622 (S9812-4)

NIIN: 01-346-5622
In stock
NSN: 5331-01-346-5622
FSC Code: 5331
MPN: S98124

5331-01-425-0934 (S9819-050)

NIIN: 01-425-0934
In stock
NSN: 5331-01-425-0934
FSC Code: 5331
MPN: S9819050

5331-01-532-7567 (S9869-1)

NIIN: 01-532-7567
In stock
NSN: 5331-01-532-7567
FSC Code: 5331
MPN: S98691

5331-01-347-6407 (S9812-3)

NIIN: 01-347-6407
In stock
NSN: 5331-01-347-6407
FSC Code: 5331
MPN: S98123

5331-01-355-8632 (S9413-750)

NIIN: 01-355-8632
In stock
NSN: 5331-01-355-8632
FSC Code: 5331
MPN: S9413750

5331-01-465-4181 (S9427B125)

NIIN: 01-465-4181
In stock
NSN: 5331-01-465-4181
FSC Code: 5331
MPN: S9427B125

5331-01-447-8192 (S9414-1-023-3)

NIIN: 01-447-8192
In stock
NSN: 5331-01-447-8192
FSC Code: 5331
MPN: S941410233

5331-01-357-8293 (S9413-675)

NIIN: 01-357-8293
In stock
NSN: 5331-01-357-8293
FSC Code: 5331
MPN: S9413675

5331-01-447-8191 (S9414-3-023-3)

NIIN: 01-447-8191
In stock
NSN: 5331-01-447-8191
FSC Code: 5331
MPN: S941430233

5331-01-355-8631 (S9413-586)

NIIN: 01-355-8631
In stock
NSN: 5331-01-355-8631
FSC Code: 5331
MPN: S9413586

5331-01-352-2572 (S9413-598)

NIIN: 01-352-2572
In stock
NSN: 5331-01-352-2572
FSC Code: 5331
MPN: S9413598

5331-01-550-5622 (S9413-552)

NIIN: 01-550-5622
In stock
NSN: 5331-01-550-5622
FSC Code: 5331
MPN: S9413552

5331-01-532-7566 (S9413-244)

NIIN: 01-532-7566
In stock
NSN: 5331-01-532-7566
FSC Code: 5331
MPN: S9413244

5331-01-495-9072 (S9413-131)

NIIN: 01-495-9072
In stock
NSN: 5331-01-495-9072
FSC Code: 5331
MPN: S9413131

5331-01-452-5910 (S9413-130)

NIIN: 01-452-5910
In stock
NSN: 5331-01-452-5910
FSC Code: 5331
MPN: S9413130

5331-01-450-2249 (S9413-111)

NIIN: 01-450-2249
In stock
NSN: 5331-01-450-2249
FSC Code: 5331
MPN: S9413111

5331-01-539-4495 (S9413-037)

NIIN: 01-539-4495
In stock
NSN: 5331-01-539-4495
FSC Code: 5331
MPN: S9413037

5331-01-495-9080 (S9413-035)

NIIN: 01-495-9080
In stock
NSN: 5331-01-495-9080
FSC Code: 5331
MPN: S9413035

5331-01-360-2986 (S9412-201)

NIIN: 01-360-2986
In stock
NSN: 5331-01-360-2986
FSC Code: 5331
MPN: S9412201

5331-01-433-6859 (S9413-029)

NIIN: 01-433-6859
In stock
NSN: 5331-01-433-6859
FSC Code: 5331
MPN: S9413029

5331-01-537-5314 (S9413-030)

NIIN: 01-537-5314
In stock
NSN: 5331-01-537-5314
FSC Code: 5331
MPN: S9413030

5331-01-346-5623 (S9412-145)

NIIN: 01-346-5623
In stock
NSN: 5331-01-346-5623
FSC Code: 5331
MPN: S9412145

5331-01-350-3170 (S9412-508)

NIIN: 01-350-3170
In stock
NSN: 5331-01-350-3170
FSC Code: 5331
MPN: S9412508

5331-01-555-7053 (S909-36-12)

NIIN: 01-555-7053
In stock
NSN: 5331-01-555-7053
FSC Code: 5331
MPN: S9093612

5331-01-556-4284 (S909-36-24)

NIIN: 01-556-4284
In stock
NSN: 5331-01-556-4284
FSC Code: 5331
MPN: S9093624

5331-01-407-0506 (S9121H52)

NIIN: 01-407-0506
In stock
NSN: 5331-01-407-0506
FSC Code: 5331
MPN: S9121H52

5331-01-556-4291 (S909-36-6)

NIIN: 01-556-4291
In stock
NSN: 5331-01-556-4291
FSC Code: 5331
MPN: S909366

5331-01-556-4286 (S909-36-8)

NIIN: 01-556-4286
In stock
NSN: 5331-01-556-4286
FSC Code: 5331
MPN: S909368

5331-01-483-9361 (S9026N920)

NIIN: 01-483-9361
In stock
NSN: 5331-01-483-9361
FSC Code: 5331
MPN: S9026N920

5331-01-557-4404 (S909-36-25)

NIIN: 01-557-4404
In stock
NSN: 5331-01-557-4404
FSC Code: 5331
MPN: S9093625

5331-01-514-5002 (S9026HSN138)

NIIN: 01-514-5002
In stock
NSN: 5331-01-514-5002
FSC Code: 5331
MPN: S9026HSN138

5331-01-407-2338 (S9028A912)

NIIN: 01-407-2338
In stock
NSN: 5331-01-407-2338
FSC Code: 5331
MPN: S9028A912

5331-01-483-9336 (S9026N047)

NIIN: 01-483-9336
In stock
NSN: 5331-01-483-9336
FSC Code: 5331
MPN: S9026N047

5331-01-483-9344 (S9026N022)

NIIN: 01-483-9344
In stock
NSN: 5331-01-483-9344
FSC Code: 5331
MPN: S9026N022

5331-01-483-9351 (S9026N906)

NIIN: 01-483-9351
In stock
NSN: 5331-01-483-9351
FSC Code: 5331
MPN: S9026N906

5331-01-483-9347 (S9026N042)

NIIN: 01-483-9347
In stock
NSN: 5331-01-483-9347
FSC Code: 5331
MPN: S9026N042