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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.

5331-01-484-8574 (SP40032A)

NIIN: 01-484-8574
In stock
NSN: 5331-01-484-8574
FSC Code: 5331
MPN: SP40032A

5331-01-376-9710 (SP-37-9)

NIIN: 01-376-9710
In stock
NSN: 5331-01-376-9710
FSC Code: 5331
MPN: SP379

5331-01-377-7350 (SPRTK109)

NIIN: 01-377-7350
In stock
NSN: 5331-01-377-7350
FSC Code: 5331
MPN: SPRTK109

5331-01-376-9666 (SP-34-9)

NIIN: 01-376-9666
In stock
NSN: 5331-01-376-9666
FSC Code: 5331
MPN: SP349

5331-01-455-5909 (SP140-7)

NIIN: 01-455-5909
In stock
NSN: 5331-01-455-5909
FSC Code: 5331
MPN: SP1407

5331-01-491-1930 (SP140-27)

NIIN: 01-491-1930
In stock
NSN: 5331-01-491-1930
FSC Code: 5331
MPN: SP14027

5331-01-438-4752 (SP103-114)

NIIN: 01-438-4752
In stock
NSN: 5331-01-438-4752
FSC Code: 5331
MPN: SP103114

5331-98-206-3916 (SP0720)

NIIN: 98-206-3916
In stock
NSN: 5331-98-206-3916
FSC Code: 5331
MPN: SP0720

5331-01-385-7066 (SOR-4-BUNA)

NIIN: 01-385-7066
In stock
NSN: 5331-01-385-7066
FSC Code: 5331
MPN: SOR4BUNA

5331-01-384-2488 (SOR-67)

NIIN: 01-384-2488
In stock
NSN: 5331-01-384-2488
FSC Code: 5331
MPN: SOR67

5331-01-461-7036 (SOR-113)

NIIN: 01-461-7036
In stock
NSN: 5331-01-461-7036
FSC Code: 5331
MPN: SOR113

5331-01-486-2782 (SOR-27)

NIIN: 01-486-2782
In stock
NSN: 5331-01-486-2782
FSC Code: 5331
MPN: SOR27

5331-01-346-0276 (SO-NB-P32)

NIIN: 01-346-0276
In stock
NSN: 5331-01-346-0276
FSC Code: 5331
MPN: SONBP32

5331-25-150-2068 (W1014/27)

NIIN: 25-150-2068
In stock
NSN: 5331-25-150-2068
FSC Code: 5331
MPN: W101427

5331-25-150-2070 (W1014/27)

NIIN: 25-150-2070
In stock
NSN: 5331-25-150-2070
FSC Code: 5331
MPN: W101427

5331-01-388-1158 (SOR-113-BUNA)

NIIN: 01-388-1158
In stock
NSN: 5331-01-388-1158
FSC Code: 5331
MPN: SOR113BUNA

5331-01-346-0275 (SO-NA-P9)

NIIN: 01-346-0275
In stock
NSN: 5331-01-346-0275
FSC Code: 5331
MPN: SONAP9

5331-01-353-1776 (SO-NB-P18)

NIIN: 01-353-1776
In stock
NSN: 5331-01-353-1776
FSC Code: 5331
MPN: SONBP18

5331-01-422-5009 (SNS-4264-25010)

NIIN: 01-422-5009
In stock
NSN: 5331-01-422-5009
FSC Code: 5331
MPN: SNS426425010

5331-01-422-5005 (SNS-4263-8005)

NIIN: 01-422-5005
In stock
NSN: 5331-01-422-5005
FSC Code: 5331
MPN: SNS42638005

5331-01-378-6807 (SN3920389)

NIIN: 01-378-6807
In stock
NSN: 5331-01-378-6807
FSC Code: 5331
MPN: SN3920389

5331-01-395-6307 (SN-412)

NIIN: 01-395-6307
In stock
NSN: 5331-01-395-6307
FSC Code: 5331
MPN: SN412

5331-01-378-7260 (SN3920389)

NIIN: 01-378-7260
In stock
NSN: 5331-01-378-7260
FSC Code: 5331
MPN: SN3920389

5331-01-378-7345 (SN3920389)

NIIN: 01-378-7345
In stock
NSN: 5331-01-378-7345
FSC Code: 5331
MPN: SN3920389

5331-01-452-6563 (SMP)

NIIN: 01-452-6563
In stock
NSN: 5331-01-452-6563
FSC Code: 5331
MPN: SMP

5331-01-406-2568 (SM-77-MF-6-B)

NIIN: 01-406-2568
In stock
NSN: 5331-01-406-2568
FSC Code: 5331
MPN: SM77MF6B

5331-01-406-2567 (SM-77-MF-9-B)

NIIN: 01-406-2567
In stock
NSN: 5331-01-406-2567
FSC Code: 5331
MPN: SM77MF9B

5331-01-436-9592 (SM0958-17)

NIIN: 01-436-9592
In stock
NSN: 5331-01-436-9592
FSC Code: 5331
MPN: SM095817

5331-01-343-4118 (SL15019)

NIIN: 01-343-4118
In stock
NSN: 5331-01-343-4118
FSC Code: 5331
MPN: SL15019

5331-01-343-4235 (SL15019)

NIIN: 01-343-4235
In stock
NSN: 5331-01-343-4235
FSC Code: 5331
MPN: SL15019

5331-01-475-2393 (SKD1VL)

NIIN: 01-475-2393
In stock
NSN: 5331-01-475-2393
FSC Code: 5331
MPN: SKD1VL

5331-01-361-4640 (SK-205380-A)

NIIN: 01-361-4640
In stock
NSN: 5331-01-361-4640
FSC Code: 5331
MPN: SK205380A

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