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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.

5331-01-007-4890 (AS3209-391)

NIIN: 01-007-4890
In stock
NSN: 5331-01-007-4890
FSC Code: 5331
MPN: AS3209391

5331-01-138-9595 (AS3209-337)

NIIN: 01-138-9595
In stock
NSN: 5331-01-138-9595
FSC Code: 5331
MPN: AS3209337

5331-00-763-0239 (AS3209-335)

NIIN: 00-763-0239
In stock
NSN: 5331-00-763-0239
FSC Code: 5331
MPN: AS3209335

5331-00-103-1836 (AS3209-280)

NIIN: 00-103-1836
In stock
NSN: 5331-00-103-1836
FSC Code: 5331
MPN: AS3209280

5331-00-103-1552 (AS3209-277)

NIIN: 00-103-1552
In stock
NSN: 5331-00-103-1552
FSC Code: 5331
MPN: AS3209277

5331-00-103-1523 (AS3209-270)

NIIN: 00-103-1523
In stock
NSN: 5331-00-103-1523
FSC Code: 5331
MPN: AS3209270

5331-00-559-3996 (AS3209-228CP)

NIIN: 00-559-3996
In stock
NSN: 5331-00-559-3996
FSC Code: 5331
MPN: AS3209228CP

5331-01-231-7478 (AS3209-233)

NIIN: 01-231-7478
In stock
NSN: 5331-01-231-7478
FSC Code: 5331
MPN: AS3209233

5331-01-008-1153 (AS3209-235)

NIIN: 01-008-1153
In stock
NSN: 5331-01-008-1153
FSC Code: 5331
MPN: AS3209235

5331-01-315-5555 (AS3209-165)

NIIN: 01-315-5555
In stock
NSN: 5331-01-315-5555
FSC Code: 5331
MPN: AS3209165

5331-01-138-9596 (AS3209-178)

NIIN: 01-138-9596
In stock
NSN: 5331-01-138-9596
FSC Code: 5331
MPN: AS3209178

5331-00-103-1791 (AS3209-159)

NIIN: 00-103-1791
In stock
NSN: 5331-00-103-1791
FSC Code: 5331
MPN: AS3209159

5331-01-416-7329 (5K74)

NIIN: 01-416-7329
In stock
NSN: 5331-01-416-7329
FSC Code: 5331
MPN: 5K74

5331-00-103-1786 (AS3209-156)

NIIN: 00-103-1786
In stock
NSN: 5331-00-103-1786
FSC Code: 5331
MPN: AS3209156

5331-00-103-1511 (AS3209-151)

NIIN: 00-103-1511
In stock
NSN: 5331-00-103-1511
FSC Code: 5331
MPN: AS3209151

5331-00-103-1813 (AS3209-141)

NIIN: 00-103-1813
In stock
NSN: 5331-00-103-1813
FSC Code: 5331
MPN: AS3209141

5331-01-111-8436 (AS3209-125)

NIIN: 01-111-8436
In stock
NSN: 5331-01-111-8436
FSC Code: 5331
MPN: AS3209125

5331-01-324-5268 (AS3209-126CP)

NIIN: 01-324-5268
In stock
NSN: 5331-01-324-5268
FSC Code: 5331
MPN: AS3209126CP

5331-00-103-1675 (AS3209-121)

NIIN: 00-103-1675
In stock
NSN: 5331-00-103-1675
FSC Code: 5331
MPN: AS3209121

5331-01-336-9871 (AS3209-119CP)

NIIN: 01-336-9871
In stock
NSN: 5331-01-336-9871
FSC Code: 5331
MPN: AS3209119CP

5331-01-130-6586 (AS3209-124)

NIIN: 01-130-6586
In stock
NSN: 5331-01-130-6586
FSC Code: 5331
MPN: AS3209124

5331-00-201-9975 (AS3209-117)

NIIN: 00-201-9975
In stock
NSN: 5331-00-201-9975
FSC Code: 5331
MPN: AS3209117

5331-00-926-0074 (AS3209-111)

NIIN: 00-926-0074
In stock
NSN: 5331-00-926-0074
FSC Code: 5331
MPN: AS3209111

5331-00-922-5058 (AS3209-042)

NIIN: 00-922-5058
In stock
NSN: 5331-00-922-5058
FSC Code: 5331
MPN: AS3209042

5331-00-926-0058 (AS3209-030)

NIIN: 00-926-0058
In stock
NSN: 5331-00-926-0058
FSC Code: 5331
MPN: AS3209030

5331-01-065-2651 (AS3209-037)

NIIN: 01-065-2651
In stock
NSN: 5331-01-065-2651
FSC Code: 5331
MPN: AS3209037

5331-01-419-8337 (5K4)

NIIN: 01-419-8337
In stock
NSN: 5331-01-419-8337
FSC Code: 5331
MPN: 5K4

5331-00-922-5896 (AS3209-012)

NIIN: 00-922-5896
In stock
NSN: 5331-00-922-5896
FSC Code: 5331
MPN: AS3209012

5331-00-922-5056 (AS3209-025)

NIIN: 00-922-5056
In stock
NSN: 5331-00-922-5056
FSC Code: 5331
MPN: AS3209025

5331-01-033-2708 (AS3209-007)

NIIN: 01-033-2708
In stock
NSN: 5331-01-033-2708
FSC Code: 5331
MPN: AS3209007

5331-01-024-4857 (AS3209-006)

NIIN: 01-024-4857
In stock
NSN: 5331-01-024-4857
FSC Code: 5331
MPN: AS3209006

5331-00-922-5963 (AS3209-0028)

NIIN: 00-922-5963
In stock
NSN: 5331-00-922-5963
FSC Code: 5331
MPN: AS32090028

5331-01-137-3961 (AS3208-05)

NIIN: 01-137-3961
In stock
NSN: 5331-01-137-3961
FSC Code: 5331
MPN: AS320805

5331-01-033-2709 (AS3208-02)

NIIN: 01-033-2709
In stock
NSN: 5331-01-033-2709
FSC Code: 5331
MPN: AS320802

5331-01-084-4750 (AS3085-255)

NIIN: 01-084-4750
In stock
NSN: 5331-01-084-4750
FSC Code: 5331
MPN: AS3085255

5331-01-049-2221 (AS3085-253)

NIIN: 01-049-2221
In stock
NSN: 5331-01-049-2221
FSC Code: 5331
MPN: AS3085253

5331-01-091-2758 (AS3085-210)

NIIN: 01-091-2758
In stock
NSN: 5331-01-091-2758
FSC Code: 5331
MPN: AS3085210

5331-01-084-6084 (AS3085-230)

NIIN: 01-084-6084
In stock
NSN: 5331-01-084-6084
FSC Code: 5331
MPN: AS3085230

5331-01-083-9602 (AS3085-228)

NIIN: 01-083-9602
In stock
NSN: 5331-01-083-9602
FSC Code: 5331
MPN: AS3085228

5331-01-027-4691 (AS3085-160AMS)

NIIN: 01-027-4691
In stock
NSN: 5331-01-027-4691
FSC Code: 5331
MPN: AS3085160AMS

5331-01-078-5126 (AS3085-162)

NIIN: 01-078-5126
In stock
NSN: 5331-01-078-5126
FSC Code: 5331
MPN: AS3085162

5331-01-084-5422 (AS3085-129)

NIIN: 01-084-5422
In stock
NSN: 5331-01-084-5422
FSC Code: 5331
MPN: AS3085129

5331-01-314-5303 (AS3085-113)

NIIN: 01-314-5303
In stock
NSN: 5331-01-314-5303
FSC Code: 5331
MPN: AS3085113

5331-01-208-0643 (AS3085-126)

NIIN: 01-208-0643
In stock
NSN: 5331-01-208-0643
FSC Code: 5331
MPN: AS3085126

5331-01-069-0532 (AS3085-117)

NIIN: 01-069-0532
In stock
NSN: 5331-01-069-0532
FSC Code: 5331
MPN: AS3085117

5331-01-044-0794 (AS3085-041)

NIIN: 01-044-0794
In stock
NSN: 5331-01-044-0794
FSC Code: 5331
MPN: AS3085041

5331-01-083-9599 (AS3085-039)

NIIN: 01-083-9599
In stock
NSN: 5331-01-083-9599
FSC Code: 5331
MPN: AS3085039

5331-01-091-1255 (AS3085-033)

NIIN: 01-091-1255
In stock
NSN: 5331-01-091-1255
FSC Code: 5331
MPN: AS3085033