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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.

5331-00-549-8279 (S8990-587)

NIIN: 00-549-8279
In stock
NSN: 5331-00-549-8279
FSC Code: 5331
MPN: S8990587

5331-00-111-4208 (S8990-577)

NIIN: 00-111-4208
In stock
NSN: 5331-00-111-4208
FSC Code: 5331
MPN: S8990577

5331-01-232-1483 (S8990-571)

NIIN: 01-232-1483
In stock
NSN: 5331-01-232-1483
FSC Code: 5331
MPN: S8990571

5331-00-220-2946 (S8990-585)

NIIN: 00-220-2946
In stock
NSN: 5331-00-220-2946
FSC Code: 5331
MPN: S8990585

5331-00-524-0732 (S8990-572)

NIIN: 00-524-0732
In stock
NSN: 5331-00-524-0732
FSC Code: 5331
MPN: S8990572

5331-01-205-9215 (S8990-575)

NIIN: 01-205-9215
In stock
NSN: 5331-01-205-9215
FSC Code: 5331
MPN: S8990575

5331-00-809-0782 (S8990-521)

NIIN: 00-809-0782
In stock
NSN: 5331-00-809-0782
FSC Code: 5331
MPN: S8990521

5331-00-951-2494 (S8990-33)

NIIN: 00-951-2494
In stock
NSN: 5331-00-951-2494
FSC Code: 5331
MPN: S899033

5331-01-057-9224 (S8990-567)

NIIN: 01-057-9224
In stock
NSN: 5331-01-057-9224
FSC Code: 5331
MPN: S8990567

5331-00-851-1211 (S8990-541)

NIIN: 00-851-1211
In stock
NSN: 5331-00-851-1211
FSC Code: 5331
MPN: S8990541

5331-00-051-7161 (S8990-559)

NIIN: 00-051-7161
In stock
NSN: 5331-00-051-7161
FSC Code: 5331
MPN: S8990559

5331-00-050-1685 (S8990-558)

NIIN: 00-050-1685
In stock
NSN: 5331-00-050-1685
FSC Code: 5331
MPN: S8990558

5331-00-406-0828 (S8990-542)

NIIN: 00-406-0828
In stock
NSN: 5331-00-406-0828
FSC Code: 5331
MPN: S8990542

5331-00-857-4420 (S8990-550)

NIIN: 00-857-4420
In stock
NSN: 5331-00-857-4420
FSC Code: 5331
MPN: S8990550

5331-00-857-4421 (S8990-528)

NIIN: 00-857-4421
In stock
NSN: 5331-00-857-4421
FSC Code: 5331
MPN: S8990528

5331-00-983-9260 (S8990-44)

NIIN: 00-983-9260
In stock
NSN: 5331-00-983-9260
FSC Code: 5331
MPN: S899044

5331-00-952-1889 (S8990-267)

NIIN: 00-952-1889
In stock
NSN: 5331-00-952-1889
FSC Code: 5331
MPN: S8990267

5331-00-857-4425 (S8990-524)

NIIN: 00-857-4425
In stock
NSN: 5331-00-857-4425
FSC Code: 5331
MPN: S8990524

5331-00-860-2390 (S8990-511)

NIIN: 00-860-2390
In stock
NSN: 5331-00-860-2390
FSC Code: 5331
MPN: S8990511

5331-00-835-1686 (S8990-265)

NIIN: 00-835-1686
In stock
NSN: 5331-00-835-1686
FSC Code: 5331
MPN: S8990265

5331-00-168-6222 (S8990-261P)

NIIN: 00-168-6222
In stock
NSN: 5331-00-168-6222
FSC Code: 5331
MPN: S8990261P

5331-00-732-3575 (S8990-24)

NIIN: 00-732-3575
In stock
NSN: 5331-00-732-3575
FSC Code: 5331
MPN: S899024

5331-01-020-5272 (S8990-249)

NIIN: 01-020-5272
In stock
NSN: 5331-01-020-5272
FSC Code: 5331
MPN: S8990249

5331-01-109-6067 (S8990-258)

NIIN: 01-109-6067
In stock
NSN: 5331-01-109-6067
FSC Code: 5331
MPN: S8990258

5331-00-519-7667 (S8990-257)

NIIN: 00-519-7667
In stock
NSN: 5331-00-519-7667
FSC Code: 5331
MPN: S8990257

5331-00-104-7576 (S8990-256)

NIIN: 00-104-7576
In stock
NSN: 5331-00-104-7576
FSC Code: 5331
MPN: S8990256

5331-00-023-4452 (S8990-212)

NIIN: 00-023-4452
In stock
NSN: 5331-00-023-4452
FSC Code: 5331
MPN: S8990212

5331-01-252-3122 (S8990-251)

NIIN: 01-252-3122
In stock
NSN: 5331-01-252-3122
FSC Code: 5331
MPN: S8990251

5331-00-881-8455 (S8990-227)

NIIN: 00-881-8455
In stock
NSN: 5331-00-881-8455
FSC Code: 5331
MPN: S8990227

5331-00-245-7202 (S8990-217)

NIIN: 00-245-7202
In stock
NSN: 5331-00-245-7202
FSC Code: 5331
MPN: S8990217

5331-00-857-5023 (S8990-16)

NIIN: 00-857-5023
In stock
NSN: 5331-00-857-5023
FSC Code: 5331
MPN: S899016

5331-00-845-6820 (S8990-223)

NIIN: 00-845-6820
In stock
NSN: 5331-00-845-6820
FSC Code: 5331
MPN: S8990223

5331-00-051-7166 (S8990-214)

NIIN: 00-051-7166
In stock
NSN: 5331-00-051-7166
FSC Code: 5331
MPN: S8990214

5331-00-877-6429 (S8990-210)

NIIN: 00-877-6429
In stock
NSN: 5331-00-877-6429
FSC Code: 5331
MPN: S8990210

5331-00-061-8006 (S8990-20)

NIIN: 00-061-8006
In stock
NSN: 5331-00-061-8006
FSC Code: 5331
MPN: S899020

5331-00-051-4027 (S8990-19)

NIIN: 00-051-4027
In stock
NSN: 5331-00-051-4027
FSC Code: 5331
MPN: S899019

5331-00-245-6770 (S8990-167)

NIIN: 00-245-6770
In stock
NSN: 5331-00-245-6770
FSC Code: 5331
MPN: S8990167

5331-01-293-5341 (S8990-141)

NIIN: 01-293-5341
In stock
NSN: 5331-01-293-5341
FSC Code: 5331
MPN: S8990141

5331-00-904-1622 (S8990-160)

NIIN: 00-904-1622
In stock
NSN: 5331-00-904-1622
FSC Code: 5331
MPN: S8990160

5331-00-411-4393 (S8990-142)

NIIN: 00-411-4393
In stock
NSN: 5331-00-411-4393
FSC Code: 5331
MPN: S8990142

5331-00-888-8051 (S8990-151)

NIIN: 00-888-8051
In stock
NSN: 5331-00-888-8051
FSC Code: 5331
MPN: S8990151

5331-00-845-9565 (S8990-143)

NIIN: 00-845-9565
In stock
NSN: 5331-00-845-9565
FSC Code: 5331
MPN: S8990143

5331-01-151-8360 (S8990-132)

NIIN: 01-151-8360
In stock
NSN: 5331-01-151-8360
FSC Code: 5331
MPN: S8990132

5331-00-052-2431 (S8990-133)

NIIN: 00-052-2431
In stock
NSN: 5331-00-052-2431
FSC Code: 5331
MPN: S8990133

5331-00-463-1458 (S8990-137)

NIIN: 00-463-1458
In stock
NSN: 5331-00-463-1458
FSC Code: 5331
MPN: S8990137

5331-00-245-7194 (S8990-130)

NIIN: 00-245-7194
In stock
NSN: 5331-00-245-7194
FSC Code: 5331
MPN: S8990130

5331-01-022-1990 (S8990-125)

NIIN: 01-022-1990
In stock
NSN: 5331-01-022-1990
FSC Code: 5331
MPN: S8990125

5331-01-395-1460 (CG-1.5-125F-01-B1-0)

NIIN: 01-395-1460
In stock
NSN: 5331-01-395-1460
FSC Code: 5331
MPN: CG15125F01B10