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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.

5331-01-421-1925 (560-647-008)

NIIN: 01-421-1925
In stock
NSN: 5331-01-421-1925
FSC Code: 5331
MPN: 560647008

5331-01-421-1913 (560-636-007)

NIIN: 01-421-1913
In stock
NSN: 5331-01-421-1913
FSC Code: 5331
MPN: 560636007

5331-01-421-1922 (560-636-011)

NIIN: 01-421-1922
In stock
NSN: 5331-01-421-1922
FSC Code: 5331
MPN: 560636011

5331-01-421-1923 (560-636-010)

NIIN: 01-421-1923
In stock
NSN: 5331-01-421-1923
FSC Code: 5331
MPN: 560636010

5331-01-421-1926 (560-636-008)

NIIN: 01-421-1926
In stock
NSN: 5331-01-421-1926
FSC Code: 5331
MPN: 560636008

5331-01-421-1915 (560-645-001)

NIIN: 01-421-1915
In stock
NSN: 5331-01-421-1915
FSC Code: 5331
MPN: 560645001

5331-01-422-5934 (560-636-015)

NIIN: 01-422-5934
In stock
NSN: 5331-01-422-5934
FSC Code: 5331
MPN: 560636015

5331-01-421-1914 (560-636-002)

NIIN: 01-421-1914
In stock
NSN: 5331-01-421-1914
FSC Code: 5331
MPN: 560636002

5331-01-421-1921 (560-636-005)

NIIN: 01-421-1921
In stock
NSN: 5331-01-421-1921
FSC Code: 5331
MPN: 560636005

5331-01-421-1928 (560-636-012)

NIIN: 01-421-1928
In stock
NSN: 5331-01-421-1928
FSC Code: 5331
MPN: 560636012

5331-01-421-1924 (560-636-004)

NIIN: 01-421-1924
In stock
NSN: 5331-01-421-1924
FSC Code: 5331
MPN: 560636004

5331-01-422-5935 (560-634-011)

NIIN: 01-422-5935
In stock
NSN: 5331-01-422-5935
FSC Code: 5331
MPN: 560634011

5331-01-424-3368 (560-636-001)

NIIN: 01-424-3368
In stock
NSN: 5331-01-424-3368
FSC Code: 5331
MPN: 560636001

5331-01-567-1470 (560-105-360)

NIIN: 01-567-1470
In stock
NSN: 5331-01-567-1470
FSC Code: 5331
MPN: 560105360

5331-01-567-1478 (560-029-360)

NIIN: 01-567-1478
In stock
NSN: 5331-01-567-1478
FSC Code: 5331
MPN: 560029360

5331-01-428-3355 (560.033.360)

NIIN: 01-428-3355
In stock
NSN: 5331-01-428-3355
FSC Code: 5331
MPN: 560033360

5331-01-531-0706 (560005V)

NIIN: 01-531-0706
In stock
NSN: 5331-01-531-0706
FSC Code: 5331
MPN: 560005V

5331-00-551-4211 (A51902PC33)

NIIN: 00-551-4211
In stock
NSN: 5331-00-551-4211
FSC Code: 5331
MPN: A51902PC33

5331-01-101-8172 (A51916)

NIIN: 01-101-8172
In stock
NSN: 5331-01-101-8172
FSC Code: 5331
MPN: A51916

5331-00-427-7241 (A51841)

NIIN: 00-427-7241
In stock
NSN: 5331-00-427-7241
FSC Code: 5331
MPN: A51841

5331-00-780-4931 (A51744)

NIIN: 00-780-4931
In stock
NSN: 5331-00-780-4931
FSC Code: 5331
MPN: A51744

5331-00-551-4216 (A51228ITEM11)

NIIN: 00-551-4216
In stock
NSN: 5331-00-551-4216
FSC Code: 5331
MPN: A51228ITEM11

5331-00-551-4214 (A51228ITEM4)

NIIN: 00-551-4214
In stock
NSN: 5331-00-551-4214
FSC Code: 5331
MPN: A51228ITEM4

5331-00-005-6149 (A51030)

NIIN: 00-005-6149
In stock
NSN: 5331-00-005-6149
FSC Code: 5331
MPN: A51030

5331-00-401-1530 (A51062)

NIIN: 00-401-1530
In stock
NSN: 5331-00-401-1530
FSC Code: 5331
MPN: A51062

5331-01-154-6029 (A-50862-1)

NIIN: 01-154-6029
In stock
NSN: 5331-01-154-6029
FSC Code: 5331
MPN: A508621

5331-01-173-6609 (A50862-2)

NIIN: 01-173-6609
In stock
NSN: 5331-01-173-6609
FSC Code: 5331
MPN: A508622

5331-00-340-6920 (A50582)

NIIN: 00-340-6920
In stock
NSN: 5331-00-340-6920
FSC Code: 5331
MPN: A50582

5331-01-260-4691 (A50412MRK)

NIIN: 01-260-4691
In stock
NSN: 5331-01-260-4691
FSC Code: 5331
MPN: A50412MRK

5331-00-411-9184 (A50055)

NIIN: 00-411-9184
In stock
NSN: 5331-00-411-9184
FSC Code: 5331
MPN: A50055

5331-01-276-8438 (A-5)

NIIN: 01-276-8438
In stock
NSN: 5331-01-276-8438
FSC Code: 5331
MPN: A5

5331-01-288-6600 (A49769-5MRV)

NIIN: 01-288-6600
In stock
NSN: 5331-01-288-6600
FSC Code: 5331
MPN: A497695MRV

5331-01-173-6597 (A49769-5MZZ)

NIIN: 01-173-6597
In stock
NSN: 5331-01-173-6597
FSC Code: 5331
MPN: A497695MZZ

5331-01-283-1584 (A49769-7MZZ)

NIIN: 01-283-1584
In stock
NSN: 5331-01-283-1584
FSC Code: 5331
MPN: A497697MZZ

5331-01-172-1872 (A49769-10MZZ)

NIIN: 01-172-1872
In stock
NSN: 5331-01-172-1872
FSC Code: 5331
MPN: A4976910MZZ

5331-01-289-4420 (A49769-7MRV)

NIIN: 01-289-4420
In stock
NSN: 5331-01-289-4420
FSC Code: 5331
MPN: A497697MRV

5331-01-178-1749 (A49717MZZ)

NIIN: 01-178-1749
In stock
NSN: 5331-01-178-1749
FSC Code: 5331
MPN: A49717MZZ

5331-01-283-1583 (A49716MBD)

NIIN: 01-283-1583
In stock
NSN: 5331-01-283-1583
FSC Code: 5331
MPN: A49716MBD

5331-01-172-1879 (A49610MRK)

NIIN: 01-172-1879
In stock
NSN: 5331-01-172-1879
FSC Code: 5331
MPN: A49610MRK

5331-01-152-7206 (A49621)

NIIN: 01-152-7206
In stock
NSN: 5331-01-152-7206
FSC Code: 5331
MPN: A49621

5331-01-174-2668 (A49570MZZ)

NIIN: 01-174-2668
In stock
NSN: 5331-01-174-2668
FSC Code: 5331
MPN: A49570MZZ

5331-01-277-2203 (A49453MZZ)

NIIN: 01-277-2203
In stock
NSN: 5331-01-277-2203
FSC Code: 5331
MPN: A49453MZZ

5331-01-172-1880 (A49487MRK)

NIIN: 01-172-1880
In stock
NSN: 5331-01-172-1880
FSC Code: 5331
MPN: A49487MRK

5331-01-449-7794 (5590-15)

NIIN: 01-449-7794
In stock
NSN: 5331-01-449-7794
FSC Code: 5331
MPN: 559015

5331-01-172-1852 (A49321MZZ)

NIIN: 01-172-1852
In stock
NSN: 5331-01-172-1852
FSC Code: 5331
MPN: A49321MZZ

5331-01-277-0164 (A49307MBD)

NIIN: 01-277-0164
In stock
NSN: 5331-01-277-0164
FSC Code: 5331
MPN: A49307MBD

5331-01-142-1527 (A48606MRF)

NIIN: 01-142-1527
In stock
NSN: 5331-01-142-1527
FSC Code: 5331
MPN: A48606MRF

5331-01-179-2267 (A48610MRK)

NIIN: 01-179-2267
In stock
NSN: 5331-01-179-2267
FSC Code: 5331
MPN: A48610MRK