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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.

5331-00-953-3833 (AS3551-253)

NIIN: 00-953-3833
In stock
NSN: 5331-00-953-3833
FSC Code: 5331
MPN: AS3551253

5331-01-206-5368 (AS3551-250)

NIIN: 01-206-5368
In stock
NSN: 5331-01-206-5368
FSC Code: 5331
MPN: AS3551250

5331-01-275-4556 (AS3551-244)

NIIN: 01-275-4556
In stock
NSN: 5331-01-275-4556
FSC Code: 5331
MPN: AS3551244

5331-00-008-5851 (AS3551-243)

NIIN: 00-008-5851
In stock
NSN: 5331-00-008-5851
FSC Code: 5331
MPN: AS3551243

5331-00-431-8876 (AS3551-249)

NIIN: 00-431-8876
In stock
NSN: 5331-00-431-8876
FSC Code: 5331
MPN: AS3551249

5331-00-701-1848 (AS3551-226)

NIIN: 00-701-1848
In stock
NSN: 5331-00-701-1848
FSC Code: 5331
MPN: AS3551226

5331-01-220-9455 (AS3551-236)

NIIN: 01-220-9455
In stock
NSN: 5331-01-220-9455
FSC Code: 5331
MPN: AS3551236

5331-00-686-1288 (AS3551-225)

NIIN: 00-686-1288
In stock
NSN: 5331-00-686-1288
FSC Code: 5331
MPN: AS3551225

5331-00-425-2080 (AS3551-241)

NIIN: 00-425-2080
In stock
NSN: 5331-00-425-2080
FSC Code: 5331
MPN: AS3551241

5331-00-882-8058 (AS3551-235)

NIIN: 00-882-8058
In stock
NSN: 5331-00-882-8058
FSC Code: 5331
MPN: AS3551235

5331-01-209-9764 (AS3551-232)

NIIN: 01-209-9764
In stock
NSN: 5331-01-209-9764
FSC Code: 5331
MPN: AS3551232

5331-00-965-7098 (AS3551-220)

NIIN: 00-965-7098
In stock
NSN: 5331-00-965-7098
FSC Code: 5331
MPN: AS3551220

5331-01-213-4809 (AS3551-219)

NIIN: 01-213-4809
In stock
NSN: 5331-01-213-4809
FSC Code: 5331
MPN: AS3551219

5331-00-914-8760 (AS3551-227)

NIIN: 00-914-8760
In stock
NSN: 5331-00-914-8760
FSC Code: 5331
MPN: AS3551227

5331-00-846-1592 (AS3551-231)

NIIN: 00-846-1592
In stock
NSN: 5331-00-846-1592
FSC Code: 5331
MPN: AS3551231

5331-00-877-9830 (AS3551-215)

NIIN: 00-877-9830
In stock
NSN: 5331-00-877-9830
FSC Code: 5331
MPN: AS3551215

5331-01-207-9962 (AS3551-212)

NIIN: 01-207-9962
In stock
NSN: 5331-01-207-9962
FSC Code: 5331
MPN: AS3551212

5331-00-060-1665 (AS3551-214)

NIIN: 00-060-1665
In stock
NSN: 5331-00-060-1665
FSC Code: 5331
MPN: AS3551214

5331-00-857-6664 (AS3551-210)

NIIN: 00-857-6664
In stock
NSN: 5331-00-857-6664
FSC Code: 5331
MPN: AS3551210

5331-00-059-8831 (AS3551-211)

NIIN: 00-059-8831
In stock
NSN: 5331-00-059-8831
FSC Code: 5331
MPN: AS3551211

5331-00-701-1819 (AS3551-163)

NIIN: 00-701-1819
In stock
NSN: 5331-00-701-1819
FSC Code: 5331
MPN: AS3551163

5331-00-726-4416 (AS3551-20)

NIIN: 00-726-4416
In stock
NSN: 5331-00-726-4416
FSC Code: 5331
MPN: AS355120

5331-01-125-9040 (AS3551-171)

NIIN: 01-125-9040
In stock
NSN: 5331-01-125-9040
FSC Code: 5331
MPN: AS3551171

5331-00-686-1314 (AS3551-160)

NIIN: 00-686-1314
In stock
NSN: 5331-00-686-1314
FSC Code: 5331
MPN: AS3551160

5331-01-268-7600 (AS3551-164)

NIIN: 01-268-7600
In stock
NSN: 5331-01-268-7600
FSC Code: 5331
MPN: AS3551164

5331-00-700-0499 (AS3551-16)

NIIN: 00-700-0499
In stock
NSN: 5331-00-700-0499
FSC Code: 5331
MPN: AS355116

5331-01-209-3488 (AS3551-146)

NIIN: 01-209-3488
In stock
NSN: 5331-01-209-3488
FSC Code: 5331
MPN: AS3551146

5331-00-865-8063 (AS3551-157)

NIIN: 00-865-8063
In stock
NSN: 5331-00-865-8063
FSC Code: 5331
MPN: AS3551157

5331-00-900-1865 (AS3551-156)

NIIN: 00-900-1865
In stock
NSN: 5331-00-900-1865
FSC Code: 5331
MPN: AS3551156

5331-00-880-3224 (AS3551-158)

NIIN: 00-880-3224
In stock
NSN: 5331-00-880-3224
FSC Code: 5331
MPN: AS3551158

5331-00-944-1525 (AS3551-151)

NIIN: 00-944-1525
In stock
NSN: 5331-00-944-1525
FSC Code: 5331
MPN: AS3551151

5331-00-916-5061 (AS3551-139)

NIIN: 00-916-5061
In stock
NSN: 5331-00-916-5061
FSC Code: 5331
MPN: AS3551139

5331-01-232-9431 (AS3551-145)

NIIN: 01-232-9431
In stock
NSN: 5331-01-232-9431
FSC Code: 5331
MPN: AS3551145

5331-01-213-4810 (AS3551-140)

NIIN: 01-213-4810
In stock
NSN: 5331-01-213-4810
FSC Code: 5331
MPN: AS3551140

5331-01-217-6840 (AS3551-144)

NIIN: 01-217-6840
In stock
NSN: 5331-01-217-6840
FSC Code: 5331
MPN: AS3551144

5331-01-151-1044 (AS3551-143)

NIIN: 01-151-1044
In stock
NSN: 5331-01-151-1044
FSC Code: 5331
MPN: AS3551143

5331-00-081-6910 (AS3551-111)

NIIN: 00-081-6910
In stock
NSN: 5331-00-081-6910
FSC Code: 5331
MPN: AS3551111

5331-00-115-1357 (AS3551-136)

NIIN: 00-115-1357
In stock
NSN: 5331-00-115-1357
FSC Code: 5331
MPN: AS3551136

5331-01-252-7319 (AS3551-126)

NIIN: 01-252-7319
In stock
NSN: 5331-01-252-7319
FSC Code: 5331
MPN: AS3551126

5331-00-846-0504 (AS3551-131)

NIIN: 00-846-0504
In stock
NSN: 5331-00-846-0504
FSC Code: 5331
MPN: AS3551131

5331-01-210-7873 (AS3551-125)

NIIN: 01-210-7873
In stock
NSN: 5331-01-210-7873
FSC Code: 5331
MPN: AS3551125

5331-01-209-3486 (AS3551-138)

NIIN: 01-209-3486
In stock
NSN: 5331-01-209-3486
FSC Code: 5331
MPN: AS3551138

5331-00-701-1768 (AS3551-127)

NIIN: 00-701-1768
In stock
NSN: 5331-00-701-1768
FSC Code: 5331
MPN: AS3551127

5331-00-686-1311 (AS3551-124)

NIIN: 00-686-1311
In stock
NSN: 5331-00-686-1311
FSC Code: 5331
MPN: AS3551124

5331-01-450-0456 (5L99)

NIIN: 01-450-0456
In stock
NSN: 5331-01-450-0456
FSC Code: 5331
MPN: 5L99

5331-00-776-2830 (AS3551-12)

NIIN: 00-776-2830
In stock
NSN: 5331-00-776-2830
FSC Code: 5331
MPN: AS355112

5331-00-677-1238 (AS3551-121)

NIIN: 00-677-1238
In stock
NSN: 5331-00-677-1238
FSC Code: 5331
MPN: AS3551121

5331-00-874-4059 (AS3551-123)

NIIN: 00-874-4059
In stock
NSN: 5331-00-874-4059
FSC Code: 5331
MPN: AS3551123