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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.

5331-01-351-5545 (MIL-R-25988/1)

NIIN: 01-351-5545
In stock
NSN: 5331-01-351-5545
FSC Code: 5331
MPN: MILR259881

5331-01-365-1463 (MIL-DTL-25988/1)

NIIN: 01-365-1463
In stock
NSN: 5331-01-365-1463
FSC Code: 5331
MPN: MILDTL259881

5331-01-379-1047 (MIL-DTL-25988/1)

NIIN: 01-379-1047
In stock
NSN: 5331-01-379-1047
FSC Code: 5331
MPN: MILDTL259881

5331-01-346-3805 (MIL-R-25988/1)

NIIN: 01-346-3805
In stock
NSN: 5331-01-346-3805
FSC Code: 5331
MPN: MILR259881

5331-01-462-7349 (MIL-DTL-25988/1)

NIIN: 01-462-7349
In stock
NSN: 5331-01-462-7349
FSC Code: 5331
MPN: MILDTL259881

5331-01-551-3758 (MIL-DTL-25988/1)

NIIN: 01-551-3758
In stock
NSN: 5331-01-551-3758
FSC Code: 5331
MPN: MILDTL259881

5331-01-446-4878 (MIL-DTL-25988/1)

NIIN: 01-446-4878
In stock
NSN: 5331-01-446-4878
FSC Code: 5331
MPN: MILDTL259881

5331-01-496-8392 (M25988/112)

NIIN: 01-496-8392
In stock
NSN: 5331-01-496-8392
FSC Code: 5331
MPN: M25988112

5331-01-470-8072 (MIL-DTL-22050)

NIIN: 01-470-8072
In stock
NSN: 5331-01-470-8072
FSC Code: 5331
MPN: MILDTL22050

5331-01-470-8071 (MIL-DTL-22050)

NIIN: 01-470-8071
In stock
NSN: 5331-01-470-8071
FSC Code: 5331
MPN: MILDTL22050

5331-01-470-8418 (M22050-3-469)

NIIN: 01-470-8418
In stock
NSN: 5331-01-470-8418
FSC Code: 5331
MPN: M220503469

5331-01-470-6148 (MIL-DTL-22050)

NIIN: 01-470-6148
In stock
NSN: 5331-01-470-6148
FSC Code: 5331
MPN: MILDTL22050

5331-01-529-3092 (M2074FN)

NIIN: 01-529-3092
In stock
NSN: 5331-01-529-3092
FSC Code: 5331
MPN: M2074FN

5331-01-529-3091 (M2074FM)

NIIN: 01-529-3091
In stock
NSN: 5331-01-529-3091
FSC Code: 5331
MPN: M2074FM

5331-01-517-3748 (M-201399-X)

NIIN: 01-517-3748
In stock
NSN: 5331-01-517-3748
FSC Code: 5331
MPN: M201399X

5331-01-561-7732 (M-18-ISO-NBR)

NIIN: 01-561-7732
In stock
NSN: 5331-01-561-7732
FSC Code: 5331
MPN: M18ISONBR

5331-01-529-2552 (M1904DQ)

NIIN: 01-529-2552
In stock
NSN: 5331-01-529-2552
FSC Code: 5331
MPN: M1904DQ

5331-01-365-3106 (M18-20)

NIIN: 01-365-3106
In stock
NSN: 5331-01-365-3106
FSC Code: 5331
MPN: M1820

5331-01-388-3183 (M17037)

NIIN: 01-388-3183
In stock
NSN: 5331-01-388-3183
FSC Code: 5331
MPN: M17037

5331-01-510-3865 (M16685CL2TY2SZG)

NIIN: 01-510-3865
In stock
NSN: 5331-01-510-3865
FSC Code: 5331
MPN: M16685CL2TY2SZG

5331-01-505-9953 (M1419-3-EA)

NIIN: 01-505-9953
In stock
NSN: 5331-01-505-9953
FSC Code: 5331
MPN: M14193EA

5331-01-376-9715 (M11W1328-7)

NIIN: 01-376-9715
In stock
NSN: 5331-01-376-9715
FSC Code: 5331
MPN: M11W13287

5331-01-400-1906 (M1200BW1-3)

NIIN: 01-400-1906
In stock
NSN: 5331-01-400-1906
FSC Code: 5331
MPN: M1200BW13

5331-01-420-3683 (M11F10839(15))

NIIN: 01-420-3683
In stock
NSN: 5331-01-420-3683
FSC Code: 5331
MPN: M11F1083915

5331-01-419-8304 (M11F10341)

NIIN: 01-419-8304
In stock
NSN: 5331-01-419-8304
FSC Code: 5331
MPN: M11F10341

5331-01-420-3686 (M11F10540(15))

NIIN: 01-420-3686
In stock
NSN: 5331-01-420-3686
FSC Code: 5331
MPN: M11F1054015

5331-01-420-8756 (M11F12542)

NIIN: 01-420-8756
In stock
NSN: 5331-01-420-8756
FSC Code: 5331
MPN: M11F12542

5331-01-351-6997 (M10840)

NIIN: 01-351-6997
In stock
NSN: 5331-01-351-6997
FSC Code: 5331
MPN: M10840

5331-01-501-7395 (M028118)

NIIN: 01-501-7395
In stock
NSN: 5331-01-501-7395
FSC Code: 5331
MPN: M028118

5331-01-501-7391 (M028099)

NIIN: 01-501-7391
In stock
NSN: 5331-01-501-7391
FSC Code: 5331
MPN: M028099

5331-01-501-7393 (M028104)

NIIN: 01-501-7393
In stock
NSN: 5331-01-501-7393
FSC Code: 5331
MPN: M028104

5331-01-524-7922 (LV117-V-70A-70)

NIIN: 01-524-7922
In stock
NSN: 5331-01-524-7922
FSC Code: 5331
MPN: LV117V70A70

5331-66-151-5750 (LTA-A12-064)

NIIN: 66-151-5750
In stock
NSN: 5331-66-151-5750
FSC Code: 5331
MPN: LTAA12064

5331-99-726-5148 (LT27333-13)

NIIN: 99-726-5148
In stock
NSN: 5331-99-726-5148
FSC Code: 5331
MPN: LT2733313

5331-99-789-5862 (LT27334-11)

NIIN: 99-789-5862
In stock
NSN: 5331-99-789-5862
FSC Code: 5331
MPN: LT2733411

5331-99-376-4083 (LT27333-11)

NIIN: 99-376-4083
In stock
NSN: 5331-99-376-4083
FSC Code: 5331
MPN: LT2733311

5331-99-238-9075 (LT27334-13)

NIIN: 99-238-9075
In stock
NSN: 5331-99-238-9075
FSC Code: 5331
MPN: LT2733413

5331-99-297-7226 (LT27331)

NIIN: 99-297-7226
In stock
NSN: 5331-99-297-7226
FSC Code: 5331
MPN: LT27331

5331-99-385-4299 (LT27331)

NIIN: 99-385-4299
In stock
NSN: 5331-99-385-4299
FSC Code: 5331
MPN: LT27331

5331-99-371-1363 (LT27332)

NIIN: 99-371-1363
In stock
NSN: 5331-99-371-1363
FSC Code: 5331
MPN: LT27332

5331-99-350-2053 (LT27332)

NIIN: 99-350-2053
In stock
NSN: 5331-99-350-2053
FSC Code: 5331
MPN: LT27332

5331-99-428-4799 (LT27331)

NIIN: 99-428-4799
In stock
NSN: 5331-99-428-4799
FSC Code: 5331
MPN: LT27331

5331-99-132-4547 (LT27331)

NIIN: 99-132-4547
In stock
NSN: 5331-99-132-4547
FSC Code: 5331
MPN: LT27331

5331-01-562-7039 (LSDT0119-1)

NIIN: 01-562-7039
In stock
NSN: 5331-01-562-7039
FSC Code: 5331
MPN: LSDT01191

5331-01-549-2103 (LSDT0119-22)

NIIN: 01-549-2103
In stock
NSN: 5331-01-549-2103
FSC Code: 5331
MPN: LSDT011922

5331-01-447-3059 (LSD-8503-7-6IN)

NIIN: 01-447-3059
In stock
NSN: 5331-01-447-3059
FSC Code: 5331
MPN: LSD850376IN

5331-01-472-5704 (LSCP070026)

NIIN: 01-472-5704
In stock
NSN: 5331-01-472-5704
FSC Code: 5331
MPN: LSCP070026

5331-01-388-8505 (LSA42M349)

NIIN: 01-388-8505
In stock
NSN: 5331-01-388-8505
FSC Code: 5331
MPN: LSA42M349