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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.

5331-01-007-4903 (M25988/1-253)

NIIN: 01-007-4903
In stock
NSN: 5331-01-007-4903
FSC Code: 5331
MPN: M259881253

5331-01-007-4902 (M25988/1-252)

NIIN: 01-007-4902
In stock
NSN: 5331-01-007-4902
FSC Code: 5331
MPN: M259881252

5331-01-007-4904 (M25988/1-254)

NIIN: 01-007-4904
In stock
NSN: 5331-01-007-4904
FSC Code: 5331
MPN: M259881254

5331-00-288-2380 (M25988/1-249)

NIIN: 00-288-2380
In stock
NSN: 5331-00-288-2380
FSC Code: 5331
MPN: M259881249

5331-00-279-4329 (M25988/1-227)

NIIN: 00-279-4329
In stock
NSN: 5331-00-279-4329
FSC Code: 5331
MPN: M259881227

5331-01-189-6351 (M25988/1-246)

NIIN: 01-189-6351
In stock
NSN: 5331-01-189-6351
FSC Code: 5331
MPN: M259881246

5331-01-007-1632 (M25988/1-248)

NIIN: 01-007-1632
In stock
NSN: 5331-01-007-1632
FSC Code: 5331
MPN: M259881248

5331-00-279-9351 (M25988/1-240)

NIIN: 00-279-9351
In stock
NSN: 5331-00-279-9351
FSC Code: 5331
MPN: M259881240

5331-00-326-4360 (M25988/1-223)

NIIN: 00-326-4360
In stock
NSN: 5331-00-326-4360
FSC Code: 5331
MPN: M259881223

5331-01-010-2420 (M25988/1-220)

NIIN: 01-010-2420
In stock
NSN: 5331-01-010-2420
FSC Code: 5331
MPN: M259881220

5331-01-086-1745 (M25988/1-209)

NIIN: 01-086-1745
In stock
NSN: 5331-01-086-1745
FSC Code: 5331
MPN: M259881209

5331-00-917-4502 (M25988/1-220)

NIIN: 00-917-4502
In stock
NSN: 5331-00-917-4502
FSC Code: 5331
MPN: M259881220

5331-01-108-0079 (M25988/1-178)

NIIN: 01-108-0079
In stock
NSN: 5331-01-108-0079
FSC Code: 5331
MPN: M259881178

5331-01-029-8944 (M25988/1-208)

NIIN: 01-029-8944
In stock
NSN: 5331-01-029-8944
FSC Code: 5331
MPN: M259881208

5331-00-301-5296 (M25988/1-175)

NIIN: 00-301-5296
In stock
NSN: 5331-00-301-5296
FSC Code: 5331
MPN: M259881175

5331-01-104-0115 (M25988/1-173)

NIIN: 01-104-0115
In stock
NSN: 5331-01-104-0115
FSC Code: 5331
MPN: M259881173

5331-00-565-4978 (M25988/1-170)

NIIN: 00-565-4978
In stock
NSN: 5331-00-565-4978
FSC Code: 5331
MPN: M259881170

5331-01-006-9053 (M25988/1-167)

NIIN: 01-006-9053
In stock
NSN: 5331-01-006-9053
FSC Code: 5331
MPN: M259881167

5331-01-149-5968 (M25988/1-163)

NIIN: 01-149-5968
In stock
NSN: 5331-01-149-5968
FSC Code: 5331
MPN: M259881163

5331-01-129-2002 (M25988/1-168)

NIIN: 01-129-2002
In stock
NSN: 5331-01-129-2002
FSC Code: 5331
MPN: M259881168

5331-01-281-6513 (M25988/1-171)

NIIN: 01-281-6513
In stock
NSN: 5331-01-281-6513
FSC Code: 5331
MPN: M259881171

5331-01-006-9052 (M25988/1-165)

NIIN: 01-006-9052
In stock
NSN: 5331-01-006-9052
FSC Code: 5331
MPN: M259881165

5331-01-007-1607 (M25988/1-161)

NIIN: 01-007-1607
In stock
NSN: 5331-01-007-1607
FSC Code: 5331
MPN: M259881161

5331-01-008-5426 (M25988/1-157)

NIIN: 01-008-5426
In stock
NSN: 5331-01-008-5426
FSC Code: 5331
MPN: M259881157

5331-01-133-4880 (M25988/1-151)

NIIN: 01-133-4880
In stock
NSN: 5331-01-133-4880
FSC Code: 5331
MPN: M259881151

5331-01-007-1623 (M25988/1-144)

NIIN: 01-007-1623
In stock
NSN: 5331-01-007-1623
FSC Code: 5331
MPN: M259881144

5331-00-357-2039 (M25988/1-142)

NIIN: 00-357-2039
In stock
NSN: 5331-00-357-2039
FSC Code: 5331
MPN: M259881142

5331-00-279-9410 (M25988/1-045)

NIIN: 00-279-9410
In stock
NSN: 5331-00-279-9410
FSC Code: 5331
MPN: M259881045

5331-01-007-1602 (M25988/1-143)

NIIN: 01-007-1602
In stock
NSN: 5331-01-007-1602
FSC Code: 5331
MPN: M259881143

5331-01-010-2422 (M25988/1-140)

NIIN: 01-010-2422
In stock
NSN: 5331-01-010-2422
FSC Code: 5331
MPN: M259881140

5331-01-209-9421 (M25988/1-107)

NIIN: 01-209-9421
In stock
NSN: 5331-01-209-9421
FSC Code: 5331
MPN: M259881107

5331-01-331-6301 (M25988/1-106)

NIIN: 01-331-6301
In stock
NSN: 5331-01-331-6301
FSC Code: 5331
MPN: M259881106

5331-01-254-5427 (M25988/1-103)

NIIN: 01-254-5427
In stock
NSN: 5331-01-254-5427
FSC Code: 5331
MPN: M259881103

5331-01-136-5352 (M25988/1-050)

NIIN: 01-136-5352
In stock
NSN: 5331-01-136-5352
FSC Code: 5331
MPN: M259881050

5331-00-281-6936 (M25988/1-047)

NIIN: 00-281-6936
In stock
NSN: 5331-00-281-6936
FSC Code: 5331
MPN: M259881047

5331-00-820-6529 (M25988/1-108)

NIIN: 00-820-6529
In stock
NSN: 5331-00-820-6529
FSC Code: 5331
MPN: M259881108

5331-00-281-6931 (M25988/1-049)

NIIN: 00-281-6931
In stock
NSN: 5331-00-281-6931
FSC Code: 5331
MPN: M259881049

5331-00-279-9411 (M25988/1-039)

NIIN: 00-279-9411
In stock
NSN: 5331-00-279-9411
FSC Code: 5331
MPN: M259881039

5331-01-171-0606 (M25988/1-046)

NIIN: 01-171-0606
In stock
NSN: 5331-01-171-0606
FSC Code: 5331
MPN: M259881046

5331-01-129-3141 (M25988/1-002)

NIIN: 01-129-3141
In stock
NSN: 5331-01-129-3141
FSC Code: 5331
MPN: M259881002

5331-01-294-5984 (M25988/1-001)

NIIN: 01-294-5984
In stock
NSN: 5331-01-294-5984
FSC Code: 5331
MPN: M259881001

5331-20-002-8994 (863179-18-ITEM)

NIIN: 20-002-8994
In stock
NSN: 5331-20-002-8994
FSC Code: 5331
MPN: 86317918ITEM

5331-20-002-8998 (863179-17-ITEM)

NIIN: 20-002-8998
In stock
NSN: 5331-20-002-8998
FSC Code: 5331
MPN: 86317917ITEM

5331-01-494-0637 (863-000752)

NIIN: 01-494-0637
In stock
NSN: 5331-01-494-0637
FSC Code: 5331
MPN: 863000752

5331-01-494-0631 (863-000751)

NIIN: 01-494-0631
In stock
NSN: 5331-01-494-0631
FSC Code: 5331
MPN: 863000751

5331-01-481-1660 (863-000602)

NIIN: 01-481-1660
In stock
NSN: 5331-01-481-1660
FSC Code: 5331
MPN: 863000602

5331-01-365-1729 (861C983G01)

NIIN: 01-365-1729
In stock
NSN: 5331-01-365-1729
FSC Code: 5331
MPN: 861C983G01

5331-17-110-2143 (D-10027-A)

NIIN: 17-110-2143
In stock
NSN: 5331-17-110-2143
FSC Code: 5331
MPN: D10027A