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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.

5331-01-509-7718 (2666850-215)

NIIN: 01-509-7718
In stock
NSN: 5331-01-509-7718
FSC Code: 5331
MPN: 2666850215

5331-01-482-8731 (2666850-119)

NIIN: 01-482-8731
In stock
NSN: 5331-01-482-8731
FSC Code: 5331
MPN: 2666850119

5331-01-482-8740 (2666850-224)

NIIN: 01-482-8740
In stock
NSN: 5331-01-482-8740
FSC Code: 5331
MPN: 2666850224

5331-01-482-8726 (2666850-116)

NIIN: 01-482-8726
In stock
NSN: 5331-01-482-8726
FSC Code: 5331
MPN: 2666850116

5331-01-426-8039 (2666850-141)

NIIN: 01-426-8039
In stock
NSN: 5331-01-426-8039
FSC Code: 5331
MPN: 2666850141

5331-01-482-8723 (2666850-111)

NIIN: 01-482-8723
In stock
NSN: 5331-01-482-8723
FSC Code: 5331
MPN: 2666850111

5331-01-365-1455 (CEC25874-011)

NIIN: 01-365-1455
In stock
NSN: 5331-01-365-1455
FSC Code: 5331
MPN: CEC25874011

5331-01-365-1451 (CEC25874-021)

NIIN: 01-365-1451
In stock
NSN: 5331-01-365-1451
FSC Code: 5331
MPN: CEC25874021

5331-01-365-1453 (CEC25874-022)

NIIN: 01-365-1453
In stock
NSN: 5331-01-365-1453
FSC Code: 5331
MPN: CEC25874022

5331-01-359-6706 (2661058BD121)

NIIN: 01-359-6706
In stock
NSN: 5331-01-359-6706
FSC Code: 5331
MPN: 2661058BD121

5331-01-365-1457 (CEC25874-016)

NIIN: 01-365-1457
In stock
NSN: 5331-01-365-1457
FSC Code: 5331
MPN: CEC25874016

5331-01-365-1454 (CEC25874-014)

NIIN: 01-365-1454
In stock
NSN: 5331-01-365-1454
FSC Code: 5331
MPN: CEC25874014

5331-01-462-9864 (2661058D016)

NIIN: 01-462-9864
In stock
NSN: 5331-01-462-9864
FSC Code: 5331
MPN: 2661058D016

5331-01-553-6678 (2661058Y248)

NIIN: 01-553-6678
In stock
NSN: 5331-01-553-6678
FSC Code: 5331
MPN: 2661058Y248

5331-01-553-6673 (2661058Y167)

NIIN: 01-553-6673
In stock
NSN: 5331-01-553-6673
FSC Code: 5331
MPN: 2661058Y167

5331-01-365-1452 (CEC25874-017)

NIIN: 01-365-1452
In stock
NSN: 5331-01-365-1452
FSC Code: 5331
MPN: CEC25874017

5331-01-385-3806 (2661058AW018)

NIIN: 01-385-3806
In stock
NSN: 5331-01-385-3806
FSC Code: 5331
MPN: 2661058AW018

5331-01-365-1456 (CEC25874-123)

NIIN: 01-365-1456
In stock
NSN: 5331-01-365-1456
FSC Code: 5331
MPN: CEC25874123

5331-01-507-3234 (2661058AZ036)

NIIN: 01-507-3234
In stock
NSN: 5331-01-507-3234
FSC Code: 5331
MPN: 2661058AZ036

5331-01-572-1322 (2661058D007)

NIIN: 01-572-1322
In stock
NSN: 5331-01-572-1322
FSC Code: 5331
MPN: 2661058D007

5331-01-387-8456 (2661058AW027)

NIIN: 01-387-8456
In stock
NSN: 5331-01-387-8456
FSC Code: 5331
MPN: 2661058AW027

5331-01-386-1464 (2661058AW111)

NIIN: 01-386-1464
In stock
NSN: 5331-01-386-1464
FSC Code: 5331
MPN: 2661058AW111

5331-01-385-2012 (2661058AW213)

NIIN: 01-385-2012
In stock
NSN: 5331-01-385-2012
FSC Code: 5331
MPN: 2661058AW213

5331-01-385-2010 (2661058AW009)

NIIN: 01-385-2010
In stock
NSN: 5331-01-385-2010
FSC Code: 5331
MPN: 2661058AW009

5331-01-385-3743 (2661058AW010)

NIIN: 01-385-3743
In stock
NSN: 5331-01-385-3743
FSC Code: 5331
MPN: 2661058AW010

5331-99-809-2979 (NA1605/1ITEM34)

NIIN: 99-809-2979
In stock
NSN: 5331-99-809-2979
FSC Code: 5331
MPN: NA16051ITEM34

5331-14-426-2116 (620.008.1104.03-ABC)

NIIN: 14-426-2116
In stock
NSN: 5331-14-426-2116
FSC Code: 5331
MPN: 620008110403ABC

5331-01-535-4079 (265-7808)

NIIN: 01-535-4079
In stock
NSN: 5331-01-535-4079
FSC Code: 5331
MPN: 2657808

5331-01-086-2356 (6463-4300)

NIIN: 01-086-2356
In stock
NSN: 5331-01-086-2356
FSC Code: 5331
MPN: 64634300

5331-01-410-8435 (MA-216993)

NIIN: 01-410-8435
In stock
NSN: 5331-01-410-8435
FSC Code: 5331
MPN: MA216993

5331-00-908-3048 (645004-021)

NIIN: 00-908-3048
In stock
NSN: 5331-00-908-3048
FSC Code: 5331
MPN: 645004021

5331-00-908-3046 (645004-010)

NIIN: 00-908-3046
In stock
NSN: 5331-00-908-3046
FSC Code: 5331
MPN: 645004010

5331-00-908-3052 (645004-119)

NIIN: 00-908-3052
In stock
NSN: 5331-00-908-3052
FSC Code: 5331
MPN: 645004119

5331-00-908-3047 (645004-020)

NIIN: 00-908-3047
In stock
NSN: 5331-00-908-3047
FSC Code: 5331
MPN: 645004020

5331-00-165-4572 (645003FF4)

NIIN: 00-165-4572
In stock
NSN: 5331-00-165-4572
FSC Code: 5331
MPN: 645003FF4

5331-00-838-2437 (645003DD6)

NIIN: 00-838-2437
In stock
NSN: 5331-00-838-2437
FSC Code: 5331
MPN: 645003DD6

5331-00-559-6534 (645001U013E)

NIIN: 00-559-6534
In stock
NSN: 5331-00-559-6534
FSC Code: 5331
MPN: 645001U013E

5331-00-908-3045 (645003DD8)

NIIN: 00-908-3045
In stock
NSN: 5331-00-908-3045
FSC Code: 5331
MPN: 645003DD8

5331-00-065-3178 (645001U252)

NIIN: 00-065-3178
In stock
NSN: 5331-00-065-3178
FSC Code: 5331
MPN: 645001U252

5331-00-559-6532 (645001U141E)

NIIN: 00-559-6532
In stock
NSN: 5331-00-559-6532
FSC Code: 5331
MPN: 645001U141E

5331-01-263-0858 (645001RR216)

NIIN: 01-263-0858
In stock
NSN: 5331-01-263-0858
FSC Code: 5331
MPN: 645001RR216

5331-01-015-4719 (645001Q168)

NIIN: 01-015-4719
In stock
NSN: 5331-01-015-4719
FSC Code: 5331
MPN: 645001Q168

5331-01-015-4718 (645001Q026)

NIIN: 01-015-4718
In stock
NSN: 5331-01-015-4718
FSC Code: 5331
MPN: 645001Q026

5331-01-004-6990 (645001Q012)

NIIN: 01-004-6990
In stock
NSN: 5331-01-004-6990
FSC Code: 5331
MPN: 645001Q012

5331-01-015-6361 (645001Q160)

NIIN: 01-015-6361
In stock
NSN: 5331-01-015-6361
FSC Code: 5331
MPN: 645001Q160

5331-00-843-7889 (645001LL263)

NIIN: 00-843-7889
In stock
NSN: 5331-00-843-7889
FSC Code: 5331
MPN: 645001LL263

5331-01-382-5133 (26451-0103)

NIIN: 01-382-5133
In stock
NSN: 5331-01-382-5133
FSC Code: 5331
MPN: 264510103

5331-01-479-3248 (M83248/2-238CP)

NIIN: 01-479-3248
In stock
NSN: 5331-01-479-3248
FSC Code: 5331
MPN: M832482238CP