Skip to content

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.

5331-01-564-3573 (S1001-1.5X75)

NIIN: 01-564-3573
In stock
NSN: 5331-01-564-3573
FSC Code: 5331
MPN: S100115X75

5331-01-564-3569 (S1001-1.5X57)

NIIN: 01-564-3569
In stock
NSN: 5331-01-564-3569
FSC Code: 5331
MPN: S100115X57

5331-01-568-0703 (S1001-1.5X23)

NIIN: 01-568-0703
In stock
NSN: 5331-01-568-0703
FSC Code: 5331
MPN: S100115X23

5331-01-377-5338 (S0958)

NIIN: 01-377-5338
In stock
NSN: 5331-01-377-5338
FSC Code: 5331
MPN: S0958

5331-01-550-2857 (S0604-3-928)

NIIN: 01-550-2857
In stock
NSN: 5331-01-550-2857
FSC Code: 5331
MPN: S06043928

5331-01-543-7659 (S01267)

NIIN: 01-543-7659
In stock
NSN: 5331-01-543-7659
FSC Code: 5331
MPN: S01267

5331-01-522-6097 (S01454)

NIIN: 01-522-6097
In stock
NSN: 5331-01-522-6097
FSC Code: 5331
MPN: S01454

5331-01-522-6095 (S01455)

NIIN: 01-522-6095
In stock
NSN: 5331-01-522-6095
FSC Code: 5331
MPN: S01455

5331-01-533-2007 (S01000-434-N3)

NIIN: 01-533-2007
In stock
NSN: 5331-01-533-2007
FSC Code: 5331
MPN: S01000434N3

5331-01-396-7220 (RYLB55)

NIIN: 01-396-7220
In stock
NSN: 5331-01-396-7220
FSC Code: 5331
MPN: RYLB55

5331-01-385-0313 (RX-173127PIECE38A)

NIIN: 01-385-0313
In stock
NSN: 5331-01-385-0313
FSC Code: 5331
MPN: RX173127PIECE38A

5331-01-384-4227 (RX-173127)

NIIN: 01-384-4227
In stock
NSN: 5331-01-384-4227
FSC Code: 5331
MPN: RX173127

5331-01-570-1512 (RX1872-12)

NIIN: 01-570-1512
In stock
NSN: 5331-01-570-1512
FSC Code: 5331
MPN: RX187212

5331-01-543-1979 (RST3006HARD)

NIIN: 01-543-1979
In stock
NSN: 5331-01-543-1979
FSC Code: 5331
MPN: RST3006HARD

5331-01-541-6117 (RST3015HARD)

NIIN: 01-541-6117
In stock
NSN: 5331-01-541-6117
FSC Code: 5331
MPN: RST3015HARD

5331-01-541-6128 (RST3014HARD)

NIIN: 01-541-6128
In stock
NSN: 5331-01-541-6128
FSC Code: 5331
MPN: RST3014HARD

5331-01-541-6115 (RST4281HARD)

NIIN: 01-541-6115
In stock
NSN: 5331-01-541-6115
FSC Code: 5331
MPN: RST4281HARD

5331-01-543-1991 (RST3011HARD)

NIIN: 01-543-1991
In stock
NSN: 5331-01-543-1991
FSC Code: 5331
MPN: RST3011HARD

5331-01-543-1970 (RST3004HARD)

NIIN: 01-543-1970
In stock
NSN: 5331-01-543-1970
FSC Code: 5331
MPN: RST3004HARD

5331-01-541-6129 (RST3013HARD)

NIIN: 01-541-6129
In stock
NSN: 5331-01-541-6129
FSC Code: 5331
MPN: RST3013HARD

5331-01-543-1992 (RST3013)

NIIN: 01-543-1992
In stock
NSN: 5331-01-543-1992
FSC Code: 5331
MPN: RST3013

5331-01-543-1965 (RST3004)

NIIN: 01-543-1965
In stock
NSN: 5331-01-543-1965
FSC Code: 5331
MPN: RST3004

5331-01-543-1986 (RST3011)

NIIN: 01-543-1986
In stock
NSN: 5331-01-543-1986
FSC Code: 5331
MPN: RST3011

5331-01-543-1985 (RST3010HARD)

NIIN: 01-543-1985
In stock
NSN: 5331-01-543-1985
FSC Code: 5331
MPN: RST3010HARD

5331-01-543-1974 (RST3005HARD)

NIIN: 01-543-1974
In stock
NSN: 5331-01-543-1974
FSC Code: 5331
MPN: RST3005HARD

5331-01-543-1967 (RST3003HARD)

NIIN: 01-543-1967
In stock
NSN: 5331-01-543-1967
FSC Code: 5331
MPN: RST3003HARD

5331-01-543-1980 (RST3010)

NIIN: 01-543-1980
In stock
NSN: 5331-01-543-1980
FSC Code: 5331
MPN: RST3010

5331-01-520-8501 (RS900AN017)

NIIN: 01-520-8501
In stock
NSN: 5331-01-520-8501
FSC Code: 5331
MPN: RS900AN017

5331-01-526-2582 (RS900AE239)

NIIN: 01-526-2582
In stock
NSN: 5331-01-526-2582
FSC Code: 5331
MPN: RS900AE239

5331-01-520-8502 (RS900AN012)

NIIN: 01-520-8502
In stock
NSN: 5331-01-520-8502
FSC Code: 5331
MPN: RS900AN012

5331-01-425-9611 (SK43-A53-0492-B-0)

NIIN: 01-425-9611
In stock
NSN: 5331-01-425-9611
FSC Code: 5331
MPN: SK43A530492B0

5331-01-341-8779 (RPKT5060F)

NIIN: 01-341-8779
In stock
NSN: 5331-01-341-8779
FSC Code: 5331
MPN: RPKT5060F

5331-01-566-5187 (RP620-6)

NIIN: 01-566-5187
In stock
NSN: 5331-01-566-5187
FSC Code: 5331
MPN: RP6206

5331-01-493-3492 (RP35B)

NIIN: 01-493-3492
In stock
NSN: 5331-01-493-3492
FSC Code: 5331
MPN: RP35B

5331-66-155-2069 (RO-UN12)

NIIN: 66-155-2069
In stock
NSN: 5331-66-155-2069
FSC Code: 5331
MPN: ROUN12

5331-01-564-1961 (RNG-0105)

NIIN: 01-564-1961
In stock
NSN: 5331-01-564-1961
FSC Code: 5331
MPN: RNG0105

5331-01-433-5270 (RM258054)

NIIN: 01-433-5270
In stock
NSN: 5331-01-433-5270
FSC Code: 5331
MPN: RM258054

5331-01-422-1258 (RM258050)

NIIN: 01-422-1258
In stock
NSN: 5331-01-422-1258
FSC Code: 5331
MPN: RM258050

5331-01-450-7175 (RM-0516-24)

NIIN: 01-450-7175
In stock
NSN: 5331-01-450-7175
FSC Code: 5331
MPN: RM051624

5331-01-449-5193 (RM-0695-30)

NIIN: 01-449-5193
In stock
NSN: 5331-01-449-5193
FSC Code: 5331
MPN: RM069530

5331-25-150-3671 (RM0395-30)

NIIN: 25-150-3671
In stock
NSN: 5331-25-150-3671
FSC Code: 5331
MPN: RM039530

5331-25-150-3261 (RM-0595-30)

NIIN: 25-150-3261
In stock
NSN: 5331-25-150-3261
FSC Code: 5331
MPN: RM059530

5331-01-450-4554 (RM-0745-30)

NIIN: 01-450-4554
In stock
NSN: 5331-01-450-4554
FSC Code: 5331
MPN: RM074530

5331-99-528-8890 (RM0695-30/G75)

NIIN: 99-528-8890
In stock
NSN: 5331-99-528-8890
FSC Code: 5331
MPN: RM069530G75

5331-17-036-6264 (RM1095-30)

NIIN: 17-036-6264
In stock
NSN: 5331-17-036-6264
FSC Code: 5331
MPN: RM109530

5331-01-449-5618 (RM-0945-30)

NIIN: 01-449-5618
In stock
NSN: 5331-01-449-5618
FSC Code: 5331
MPN: RM094530

5331-01-355-6727 (RM0695-30)

NIIN: 01-355-6727
In stock
NSN: 5331-01-355-6727
FSC Code: 5331
MPN: RM069530

5331-25-150-3262 (RM-0645-30)

NIIN: 25-150-3262
In stock
NSN: 5331-25-150-3262
FSC Code: 5331
MPN: RM064530