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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.

5331-01-539-0287 (875522C1)

NIIN: 01-539-0287
In stock
NSN: 5331-01-539-0287
FSC Code: 5331
MPN: 875522C1

5331-00-113-3836 (M383-4)

NIIN: 00-113-3836
In stock
NSN: 5331-00-113-3836
FSC Code: 5331
MPN: M3834

5331-01-434-4836 (87486-0)

NIIN: 01-434-4836
In stock
NSN: 5331-01-434-4836
FSC Code: 5331
MPN: 874860

5331-01-525-8152 (8-74-80-09-062)

NIIN: 01-525-8152
In stock
NSN: 5331-01-525-8152
FSC Code: 5331
MPN: 8748009062

5331-01-448-6798 (8-74-80-09-072)

NIIN: 01-448-6798
In stock
NSN: 5331-01-448-6798
FSC Code: 5331
MPN: 8748009072

5331-01-162-3720 (M345-19)

NIIN: 01-162-3720
In stock
NSN: 5331-01-162-3720
FSC Code: 5331
MPN: M34519

5331-01-458-5559 (872FS-Z001-33)

NIIN: 01-458-5559
In stock
NSN: 5331-01-458-5559
FSC Code: 5331
MPN: 872FSZ00133

5331-00-005-0813 (M346-3)

NIIN: 00-005-0813
In stock
NSN: 5331-00-005-0813
FSC Code: 5331
MPN: M3463

5331-00-115-5970 (M328010023)

NIIN: 00-115-5970
In stock
NSN: 5331-00-115-5970
FSC Code: 5331
MPN: M328010023

5331-00-115-5969 (M328010022)

NIIN: 00-115-5969
In stock
NSN: 5331-00-115-5969
FSC Code: 5331
MPN: M328010022

5331-00-115-5968 (M328010021)

NIIN: 00-115-5968
In stock
NSN: 5331-00-115-5968
FSC Code: 5331
MPN: M328010021

5331-01-499-8509 (8720-6124)

NIIN: 01-499-8509
In stock
NSN: 5331-01-499-8509
FSC Code: 5331
MPN: 87206124

5331-01-499-8510 (8720-6157)

NIIN: 01-499-8510
In stock
NSN: 5331-01-499-8510
FSC Code: 5331
MPN: 87206157

5331-01-166-5776 (M3148-7)

NIIN: 01-166-5776
In stock
NSN: 5331-01-166-5776
FSC Code: 5331
MPN: M31487

5331-01-221-5808 (M-3126)

NIIN: 01-221-5808
In stock
NSN: 5331-01-221-5808
FSC Code: 5331
MPN: M3126

5331-01-084-2406 (M301)

NIIN: 01-084-2406
In stock
NSN: 5331-01-084-2406
FSC Code: 5331
MPN: M301

5331-01-377-7338 (87140-S95)

NIIN: 01-377-7338
In stock
NSN: 5331-01-377-7338
FSC Code: 5331
MPN: 87140S95

5331-01-380-3874 (8712349-01)

NIIN: 01-380-3874
In stock
NSN: 5331-01-380-3874
FSC Code: 5331
MPN: 871234901

5331-01-431-5665 (87115-S95)

NIIN: 01-431-5665
In stock
NSN: 5331-01-431-5665
FSC Code: 5331
MPN: 87115S95

5331-01-431-5662 (87012-S95)

NIIN: 01-431-5662
In stock
NSN: 5331-01-431-5662
FSC Code: 5331
MPN: 87012S95

5331-01-431-5663 (87014-S94)

NIIN: 01-431-5663
In stock
NSN: 5331-01-431-5663
FSC Code: 5331
MPN: 87014S94

5331-01-085-3257 (M25988-2-014ES)

NIIN: 01-085-3257
In stock
NSN: 5331-01-085-3257
FSC Code: 5331
MPN: M259882014ES

5331-00-279-4165 (M25988-1-325)

NIIN: 00-279-4165
In stock
NSN: 5331-00-279-4165
FSC Code: 5331
MPN: M259881325

5331-01-129-2010 (M25988/4-221)

NIIN: 01-129-2010
In stock
NSN: 5331-01-129-2010
FSC Code: 5331
MPN: M259884221

5331-01-088-3432 (M25988/4-916)

NIIN: 01-088-3432
In stock
NSN: 5331-01-088-3432
FSC Code: 5331
MPN: M259884916

5331-00-340-4281 (M25988-1-141ES)

NIIN: 00-340-4281
In stock
NSN: 5331-00-340-4281
FSC Code: 5331
MPN: M259881141ES

5331-01-243-4495 (M25988/4-920)

NIIN: 01-243-4495
In stock
NSN: 5331-01-243-4495
FSC Code: 5331
MPN: M259884920

5331-01-129-2009 (M25988/4-142)

NIIN: 01-129-2009
In stock
NSN: 5331-01-129-2009
FSC Code: 5331
MPN: M259884142

5331-01-259-4459 (M25988/4-151)

NIIN: 01-259-4459
In stock
NSN: 5331-01-259-4459
FSC Code: 5331
MPN: M259884151

5331-01-129-2012 (M25988/4-143)

NIIN: 01-129-2012
In stock
NSN: 5331-01-129-2012
FSC Code: 5331
MPN: M259884143

5331-01-216-5706 (M25988/4-107)

NIIN: 01-216-5706
In stock
NSN: 5331-01-216-5706
FSC Code: 5331
MPN: M259884107

5331-01-272-2585 (M25988/4-136)

NIIN: 01-272-2585
In stock
NSN: 5331-01-272-2585
FSC Code: 5331
MPN: M259884136

5331-01-129-2013 (M25988/4-135)

NIIN: 01-129-2013
In stock
NSN: 5331-01-129-2013
FSC Code: 5331
MPN: M259884135

5331-01-272-2584 (M25988/4-048)

NIIN: 01-272-2584
In stock
NSN: 5331-01-272-2584
FSC Code: 5331
MPN: M259884048

5331-01-054-2591 (M25988/4-042)

NIIN: 01-054-2591
In stock
NSN: 5331-01-054-2591
FSC Code: 5331
MPN: M259884042

5331-01-267-7409 (M25988/4-039)

NIIN: 01-267-7409
In stock
NSN: 5331-01-267-7409
FSC Code: 5331
MPN: M259884039

5331-01-189-8268 (M25988/4-029)

NIIN: 01-189-8268
In stock
NSN: 5331-01-189-8268
FSC Code: 5331
MPN: M259884029

5331-01-006-3934 (M25988/4-030)

NIIN: 01-006-3934
In stock
NSN: 5331-01-006-3934
FSC Code: 5331
MPN: M259884030

5331-01-208-3676 (M25988/3-359)

NIIN: 01-208-3676
In stock
NSN: 5331-01-208-3676
FSC Code: 5331
MPN: M259883359

5331-01-227-4049 (M25988/3-430)

NIIN: 01-227-4049
In stock
NSN: 5331-01-227-4049
FSC Code: 5331
MPN: M259883430

5331-01-129-3151 (M25988/3-267)

NIIN: 01-129-3151
In stock
NSN: 5331-01-129-3151
FSC Code: 5331
MPN: M259883267

5331-01-149-5967 (M25988/3-255)

NIIN: 01-149-5967
In stock
NSN: 5331-01-149-5967
FSC Code: 5331
MPN: M259883255

5331-01-090-6792 (M25988/3-222)

NIIN: 01-090-6792
In stock
NSN: 5331-01-090-6792
FSC Code: 5331
MPN: M259883222

5331-01-129-9439 (M25988/3-167)

NIIN: 01-129-9439
In stock
NSN: 5331-01-129-9439
FSC Code: 5331
MPN: M259883167

5331-01-130-9660 (M25988/3-165)

NIIN: 01-130-9660
In stock
NSN: 5331-01-130-9660
FSC Code: 5331
MPN: M259883165

5331-01-132-0269 (M25988/3-131)

NIIN: 01-132-0269
In stock
NSN: 5331-01-132-0269
FSC Code: 5331
MPN: M259883131

5331-01-369-7318 (865873-01)

NIIN: 01-369-7318
In stock
NSN: 5331-01-369-7318
FSC Code: 5331
MPN: 86587301

5331-01-374-4468 (865876-01)

NIIN: 01-374-4468
In stock
NSN: 5331-01-374-4468
FSC Code: 5331
MPN: 86587601