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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.

5331-01-501-4324 (5331PL0658583)

NIIN: 01-501-4324
In stock
NSN: 5331-01-501-4324
FSC Code: 5331
MPN: 5331PL0658583

5331-01-556-0444 (6278E74-P12)

NIIN: 01-556-0444
In stock
NSN: 5331-01-556-0444
FSC Code: 5331
MPN: 6278E74P12

5331-01-383-3704 (2-239E962-90)

NIIN: 01-383-3704
In stock
NSN: 5331-01-383-3704
FSC Code: 5331
MPN: 2239E96290

5331-01-368-4665 (2-239V747-75)

NIIN: 01-368-4665
In stock
NSN: 5331-01-368-4665
FSC Code: 5331
MPN: 2239V74775

5331-01-342-7761 (2-238-E515-80)

NIIN: 01-342-7761
In stock
NSN: 5331-01-342-7761
FSC Code: 5331
MPN: 2238E51580

5331-01-385-6492 (MIL-DTL-25988/3)

NIIN: 01-385-6492
In stock
NSN: 5331-01-385-6492
FSC Code: 5331
MPN: MILDTL259883

5331-01-352-7742 (2-238N507-90)

NIIN: 01-352-7742
In stock
NSN: 5331-01-352-7742
FSC Code: 5331
MPN: 2238N50790

5331-01-418-9135 (2-238E688-70)

NIIN: 01-418-9135
In stock
NSN: 5331-01-418-9135
FSC Code: 5331
MPN: 2238E68870

5331-01-452-0672 (2-237V884-75)

NIIN: 01-452-0672
In stock
NSN: 5331-01-452-0672
FSC Code: 5331
MPN: 2237V88475

5331-01-508-0244 (2-238)

NIIN: 01-508-0244
In stock
NSN: 5331-01-508-0244
FSC Code: 5331
MPN: 2238

5331-01-383-3447 (2-237A)

NIIN: 01-383-3447
In stock
NSN: 5331-01-383-3447
FSC Code: 5331
MPN: 2237A

5331-01-418-9134 (2-237E688-70)

NIIN: 01-418-9134
In stock
NSN: 5331-01-418-9134
FSC Code: 5331
MPN: 2237E68870

5331-01-337-4746 (5S45700)

NIIN: 01-337-4746
In stock
NSN: 5331-01-337-4746
FSC Code: 5331
MPN: 5S45700

5331-01-530-8247 (2-235N0552-90)

NIIN: 01-530-8247
In stock
NSN: 5331-01-530-8247
FSC Code: 5331
MPN: 2235N055290

5331-01-553-1806 (2-235-V709-90CP)

NIIN: 01-553-1806
In stock
NSN: 5331-01-553-1806
FSC Code: 5331
MPN: 2235V70990CP

5331-01-508-4143 (2-236)

NIIN: 01-508-4143
In stock
NSN: 5331-01-508-4143
FSC Code: 5331
MPN: 2236

5331-01-381-5337 (2-235A)

NIIN: 01-381-5337
In stock
NSN: 5331-01-381-5337
FSC Code: 5331
MPN: 2235A

5331-00-118-2981 (5S1105)

NIIN: 00-118-2981
In stock
NSN: 5331-00-118-2981
FSC Code: 5331
MPN: 5S1105

5331-00-576-5308 (5R20-32)

NIIN: 00-576-5308
In stock
NSN: 5331-00-576-5308
FSC Code: 5331
MPN: 5R2032

5331-01-407-2399 (2-234E540-80)

NIIN: 01-407-2399
In stock
NSN: 5331-01-407-2399
FSC Code: 5331
MPN: 2234E54080

5331-00-810-9386 (5R21-11)

NIIN: 00-810-9386
In stock
NSN: 5331-00-810-9386
FSC Code: 5331
MPN: 5R2111

5331-00-810-9382 (5R21-16)

NIIN: 00-810-9382
In stock
NSN: 5331-00-810-9382
FSC Code: 5331
MPN: 5R2116

5331-00-584-9618 (5R18-12)

NIIN: 00-584-9618
In stock
NSN: 5331-00-584-9618
FSC Code: 5331
MPN: 5R1812

5331-00-663-7954 (5R20-4)

NIIN: 00-663-7954
In stock
NSN: 5331-00-663-7954
FSC Code: 5331
MPN: 5R204

5331-00-585-0389 (5R20-8)

NIIN: 00-585-0389
In stock
NSN: 5331-00-585-0389
FSC Code: 5331
MPN: 5R208

5331-01-562-0950 (223412-27)

NIIN: 01-562-0950
In stock
NSN: 5331-01-562-0950
FSC Code: 5331
MPN: 22341227

5331-00-819-2707 (5R20-3)

NIIN: 00-819-2707
In stock
NSN: 5331-00-819-2707
FSC Code: 5331
MPN: 5R203

5331-00-599-6514 (5R18-16)

NIIN: 00-599-6514
In stock
NSN: 5331-00-599-6514
FSC Code: 5331
MPN: 5R1816

5331-00-599-0069 (5R13-9)

NIIN: 00-599-0069
In stock
NSN: 5331-00-599-0069
FSC Code: 5331
MPN: 5R139

5331-01-412-4049 (2234121-40)

NIIN: 01-412-4049
In stock
NSN: 5331-01-412-4049
FSC Code: 5331
MPN: 223412140

5331-01-447-3085 (FIG.C-00349-0-8)

NIIN: 01-447-3085
In stock
NSN: 5331-01-447-3085
FSC Code: 5331
MPN: FIGC0034908

5331-01-562-0896 (223412-17)

NIIN: 01-562-0896
In stock
NSN: 5331-01-562-0896
FSC Code: 5331
MPN: 22341217

5331-01-562-0966 (223412-55)

NIIN: 01-562-0966
In stock
NSN: 5331-01-562-0966
FSC Code: 5331
MPN: 22341255

5331-01-479-3141 (223406-49)

NIIN: 01-479-3141
In stock
NSN: 5331-01-479-3141
FSC Code: 5331
MPN: 22340649

5331-01-398-7073 (223404-74)

NIIN: 01-398-7073
In stock
NSN: 5331-01-398-7073
FSC Code: 5331
MPN: 22340474

5331-01-562-0955 (223412-39)

NIIN: 01-562-0955
In stock
NSN: 5331-01-562-0955
FSC Code: 5331
MPN: 22341239

5331-00-599-0068 (5R13-7)

NIIN: 00-599-0068
In stock
NSN: 5331-00-599-0068
FSC Code: 5331
MPN: 5R137

5331-01-562-0930 (223412-22)

NIIN: 01-562-0930
In stock
NSN: 5331-01-562-0930
FSC Code: 5331
MPN: 22341222

5331-01-430-7144 (223410-08)

NIIN: 01-430-7144
In stock
NSN: 5331-01-430-7144
FSC Code: 5331
MPN: 22341008

5331-01-411-1635 (223404-70)

NIIN: 01-411-1635
In stock
NSN: 5331-01-411-1635
FSC Code: 5331
MPN: 22340470

5331-01-562-0666 (223404-05)

NIIN: 01-562-0666
In stock
NSN: 5331-01-562-0666
FSC Code: 5331
MPN: 22340405

5331-01-420-2082 (223406-5)

NIIN: 01-420-2082
In stock
NSN: 5331-01-420-2082
FSC Code: 5331
MPN: 2234065

5331-01-562-2950 (223403-60)

NIIN: 01-562-2950
In stock
NSN: 5331-01-562-2950
FSC Code: 5331
MPN: 22340360

5331-01-562-3006 (223402-04)

NIIN: 01-562-3006
In stock
NSN: 5331-01-562-3006
FSC Code: 5331
MPN: 22340204

5331-01-458-0307 (223402-54)

NIIN: 01-458-0307
In stock
NSN: 5331-01-458-0307
FSC Code: 5331
MPN: 22340254

5331-01-420-2085 (223402-11)

NIIN: 01-420-2085
In stock
NSN: 5331-01-420-2085
FSC Code: 5331
MPN: 22340211

5331-00-599-0071 (5R13-5)

NIIN: 00-599-0071
In stock
NSN: 5331-00-599-0071
FSC Code: 5331
MPN: 5R135

5331-00-584-2160 (5R13-19)

NIIN: 00-584-2160
In stock
NSN: 5331-00-584-2160
FSC Code: 5331
MPN: 5R1319