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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.

5331-00-942-2492 (78114-127)

NIIN: 00-942-2492
In stock
NSN: 5331-00-942-2492
FSC Code: 5331
MPN: 78114127

5331-00-914-9578 (78115-904)

NIIN: 00-914-9578
In stock
NSN: 5331-00-914-9578
FSC Code: 5331
MPN: 78115904

5331-00-942-2496 (78114-148)

NIIN: 00-942-2496
In stock
NSN: 5331-00-942-2496
FSC Code: 5331
MPN: 78114148

5331-01-214-7715 (78-091-000)

NIIN: 01-214-7715
In stock
NSN: 5331-01-214-7715
FSC Code: 5331
MPN: 78091000

5331-00-933-0854 (78-092)

NIIN: 00-933-0854
In stock
NSN: 5331-00-933-0854
FSC Code: 5331
MPN: 78092

5331-00-933-0852 (78-090)

NIIN: 00-933-0852
In stock
NSN: 5331-00-933-0852
FSC Code: 5331
MPN: 78090

5331-01-539-6591 (37B201532P101)

NIIN: 01-539-6591
In stock
NSN: 5331-01-539-6591
FSC Code: 5331
MPN: 37B201532P101

5331-00-082-5155 (78-062)

NIIN: 00-082-5155
In stock
NSN: 5331-00-082-5155
FSC Code: 5331
MPN: 78062

5331-00-969-2831 (78-033)

NIIN: 00-969-2831
In stock
NSN: 5331-00-969-2831
FSC Code: 5331
MPN: 78033

5331-00-969-2832 (78-032)

NIIN: 00-969-2832
In stock
NSN: 5331-00-969-2832
FSC Code: 5331
MPN: 78032

5331-01-556-4704 (379181R1)

NIIN: 01-556-4704
In stock
NSN: 5331-01-556-4704
FSC Code: 5331
MPN: 379181R1

5331-01-513-5813 (37918R1)

NIIN: 01-513-5813
In stock
NSN: 5331-01-513-5813
FSC Code: 5331
MPN: 37918R1

5331-01-125-3508 (7801H45906PKGINLET)

NIIN: 01-125-3508
In stock
NSN: 5331-01-125-3508
FSC Code: 5331
MPN: 7801H45906PKGINLET

5331-01-217-6839 (78-0115-4005)

NIIN: 01-217-6839
In stock
NSN: 5331-01-217-6839
FSC Code: 5331
MPN: 7801154005

5331-00-080-0275 (78-011)

NIIN: 00-080-0275
In stock
NSN: 5331-00-080-0275
FSC Code: 5331
MPN: 78011

5331-00-166-8483 (78-009)

NIIN: 00-166-8483
In stock
NSN: 5331-00-166-8483
FSC Code: 5331
MPN: 78009

5331-00-591-7986 (780-02237)

NIIN: 00-591-7986
In stock
NSN: 5331-00-591-7986
FSC Code: 5331
MPN: 78002237

5331-01-084-4743 (780-02116)

NIIN: 01-084-4743
In stock
NSN: 5331-01-084-4743
FSC Code: 5331
MPN: 78002116

5331-01-084-4742 (780-02114)

NIIN: 01-084-4742
In stock
NSN: 5331-01-084-4742
FSC Code: 5331
MPN: 78002114

5331-00-413-9353 (78-003)

NIIN: 00-413-9353
In stock
NSN: 5331-00-413-9353
FSC Code: 5331
MPN: 78003

5331-01-564-1297 (37835-PGK-A01)

NIIN: 01-564-1297
In stock
NSN: 5331-01-564-1297
FSC Code: 5331
MPN: 37835PGKA01

5331-00-790-6319 (780-02110)

NIIN: 00-790-6319
In stock
NSN: 5331-00-790-6319
FSC Code: 5331
MPN: 78002110

5331-01-145-3161 (780-02012)

NIIN: 01-145-3161
In stock
NSN: 5331-01-145-3161
FSC Code: 5331
MPN: 78002012

5331-01-145-3159 (780-01112)

NIIN: 01-145-3159
In stock
NSN: 5331-01-145-3159
FSC Code: 5331
MPN: 78001112

5331-01-145-3160 (780-01231)

NIIN: 01-145-3160
In stock
NSN: 5331-01-145-3160
FSC Code: 5331
MPN: 78001231

5331-01-285-9264 (780-01115)

NIIN: 01-285-9264
In stock
NSN: 5331-01-285-9264
FSC Code: 5331
MPN: 78001115

5331-01-572-4002 (377952R1)

NIIN: 01-572-4002
In stock
NSN: 5331-01-572-4002
FSC Code: 5331
MPN: 377952R1

5331-01-509-8594 (376C036B11)

NIIN: 01-509-8594
In stock
NSN: 5331-01-509-8594
FSC Code: 5331
MPN: 376C036B11

5331-01-421-9886 (3769-0018)

NIIN: 01-421-9886
In stock
NSN: 5331-01-421-9886
FSC Code: 5331
MPN: 37690018

5331-01-421-9885 (3769-0006)

NIIN: 01-421-9885
In stock
NSN: 5331-01-421-9885
FSC Code: 5331
MPN: 37690006

5331-01-428-3670 (3769-1115)

NIIN: 01-428-3670
In stock
NSN: 5331-01-428-3670
FSC Code: 5331
MPN: 37691115

5331-01-453-6521 (37622-339)

NIIN: 01-453-6521
In stock
NSN: 5331-01-453-6521
FSC Code: 5331
MPN: 37622339

5331-01-509-8074 (37622-339)

NIIN: 01-509-8074
In stock
NSN: 5331-01-509-8074
FSC Code: 5331
MPN: 37622339

5331-01-551-6949 (37604-331)

NIIN: 01-551-6949
In stock
NSN: 5331-01-551-6949
FSC Code: 5331
MPN: 37604331

5331-01-371-9730 (Y-375S64X8)

NIIN: 01-371-9730
In stock
NSN: 5331-01-371-9730
FSC Code: 5331
MPN: Y375S64X8

5331-01-387-0192 (375B011QTA)

NIIN: 01-387-0192
In stock
NSN: 5331-01-387-0192
FSC Code: 5331
MPN: 375B011QTA

5331-01-438-5456 (375-Z-358-AAA)

NIIN: 01-438-5456
In stock
NSN: 5331-01-438-5456
FSC Code: 5331
MPN: 375Z358AAA

5331-01-340-8196 (J375B212GUA)

NIIN: 01-340-8196
In stock
NSN: 5331-01-340-8196
FSC Code: 5331
MPN: J375B212GUA

5331-01-384-2547 (375-B-206-SU-A)

NIIN: 01-384-2547
In stock
NSN: 5331-01-384-2547
FSC Code: 5331
MPN: 375B206SUA

5331-01-459-7296 (LR-1305-270)

NIIN: 01-459-7296
In stock
NSN: 5331-01-459-7296
FSC Code: 5331
MPN: LR1305270

5331-01-348-2513 (375-B-219-SU-A)

NIIN: 01-348-2513
In stock
NSN: 5331-01-348-2513
FSC Code: 5331
MPN: 375B219SUA

5331-01-499-1447 (375B0228QTA)

NIIN: 01-499-1447
In stock
NSN: 5331-01-499-1447
FSC Code: 5331
MPN: 375B0228QTA

5331-01-387-0194 (375B116QTA)

NIIN: 01-387-0194
In stock
NSN: 5331-01-387-0194
FSC Code: 5331
MPN: 375B116QTA

5331-01-450-4553 (375B128QTA)

NIIN: 01-450-4553
In stock
NSN: 5331-01-450-4553
FSC Code: 5331
MPN: 375B128QTA

5331-01-360-2838 (375B229QMA)

NIIN: 01-360-2838
In stock
NSN: 5331-01-360-2838
FSC Code: 5331
MPN: 375B229QMA

5331-01-508-7048 (375B009SYA)

NIIN: 01-508-7048
In stock
NSN: 5331-01-508-7048
FSC Code: 5331
MPN: 375B009SYA

5331-01-508-7046 (375B006SYA)

NIIN: 01-508-7046
In stock
NSN: 5331-01-508-7046
FSC Code: 5331
MPN: 375B006SYA

5331-01-526-7222 (M-1140-154ITEM19)

NIIN: 01-526-7222
In stock
NSN: 5331-01-526-7222
FSC Code: 5331
MPN: M1140154ITEM19