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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.

5331-01-729-7368 (Y325-123)

NIIN: 01-729-7368
In stock
NSN: 5331-01-729-7368
FSC Code: 5331
MPN: Y325123

5331-01-729-7271 (Y325-119)

NIIN: 01-729-7271
In stock
NSN: 5331-01-729-7271
FSC Code: 5331
MPN: Y325119

5331-01-729-6999 (94433)

NIIN: 01-729-6999
In stock
NSN: 5331-01-729-6999
FSC Code: 5331
MPN: 94433

5331-01-729-6782 (13115353)

NIIN: 01-729-6782
In stock
NSN: 5331-01-729-6782
FSC Code: 5331
MPN: 13115353

5331-01-729-3260 (11-947)

NIIN: 01-729-3260
In stock
NSN: 5331-01-729-3260
FSC Code: 5331
MPN: 11947

5331-01-729-2486 (31952849)

NIIN: 01-729-2486
In stock
NSN: 5331-01-729-2486
FSC Code: 5331
MPN: 31952849

5331-01-729-6092 (810901-030)

NIIN: 01-729-6092
In stock
NSN: 5331-01-729-6092
FSC Code: 5331
MPN: 810901030

5331-01-729-2515 (R56757)

NIIN: 01-729-2515
In stock
NSN: 5331-01-729-2515
FSC Code: 5331
MPN: R56757

5331-01-729-1238 (33-26128)

NIIN: 01-729-1238
In stock
NSN: 5331-01-729-1238
FSC Code: 5331
MPN: 3326128

5331-01-730-5471 (278044-1)

NIIN: 01-730-5471
In stock
NSN: 5331-01-730-5471
FSC Code: 5331
MPN: 2780441

5331-01-729-7461 (Y325-202)

NIIN: 01-729-7461
In stock
NSN: 5331-01-729-7461
FSC Code: 5331
MPN: Y325202

5331-01-729-6351 (F088206)

NIIN: 01-729-6351
In stock
NSN: 5331-01-729-6351
FSC Code: 5331
MPN: F088206

5331-01-729-6140 (9A-0001-0038R)

NIIN: 01-729-6140
In stock
NSN: 5331-01-729-6140
FSC Code: 5331
MPN: 9A00010038R

5331-01-729-3548 (810901-223)

NIIN: 01-729-3548
In stock
NSN: 5331-01-729-3548
FSC Code: 5331
MPN: 810901223

5331-01-729-1929 (W2T842740)

NIIN: 01-729-1929
In stock
NSN: 5331-01-729-1929
FSC Code: 5331
MPN: W2T842740

5331-01-729-1188 (3336204)

NIIN: 01-729-1188
In stock
NSN: 5331-01-729-1188
FSC Code: 5331
MPN: 3336204

5331-01-729-0142 (2-238)

NIIN: 01-729-0142
In stock
NSN: 5331-01-729-0142
FSC Code: 5331
MPN: 2238

5331-01-729-5578 (R501632)

NIIN: 01-729-5578
In stock
NSN: 5331-01-729-5578
FSC Code: 5331
MPN: R501632

5331-01-729-2829 (13115624)

NIIN: 01-729-2829
In stock
NSN: 5331-01-729-2829
FSC Code: 5331
MPN: 13115624

5331-01-729-2574 (SAE-AS29513)

NIIN: 01-729-2574
In stock
NSN: 5331-01-729-2574
FSC Code: 5331
MPN: SAEAS29513

5331-01-729-1927 (W2T842730)

NIIN: 01-729-1927
In stock
NSN: 5331-01-729-1927
FSC Code: 5331
MPN: W2T842730

5331-01-728-9786 (KSD017419)

NIIN: 01-728-9786
In stock
NSN: 5331-01-728-9786
FSC Code: 5331
MPN: KSD017419

5331-01-728-8611 (MTUXP59507500003)

NIIN: 01-728-8611
In stock
NSN: 5331-01-728-8611
FSC Code: 5331
MPN: MTUXP59507500003

5331-01-730-6178 (M22050-2-469)

NIIN: 01-730-6178
In stock
NSN: 5331-01-730-6178
FSC Code: 5331
MPN: M220502469

5331-01-729-6371 (568123-31)

NIIN: 01-729-6371
In stock
NSN: 5331-01-729-6371
FSC Code: 5331
MPN: 56812331

5331-01-729-6151 (K3VL80, CODE 710)

NIIN: 01-729-6151
In stock
NSN: 5331-01-729-6151
FSC Code: 5331
MPN: K3VL80CODE710

5331-01-729-4073 (K3VL80,CODE 729)

NIIN: 01-729-4073
In stock
NSN: 5331-01-729-4073
FSC Code: 5331
MPN: K3VL80CODE729

5331-01-729-3319 (T44604)

NIIN: 01-729-3319
In stock
NSN: 5331-01-729-3319
FSC Code: 5331
MPN: T44604

5331-01-729-2968 (12-586)

NIIN: 01-729-2968
In stock
NSN: 5331-01-729-2968
FSC Code: 5331
MPN: 12586

5331-01-730-2785 (F088360)

NIIN: 01-730-2785
In stock
NSN: 5331-01-730-2785
FSC Code: 5331
MPN: F088360

5331-01-729-6832 (13118708)

NIIN: 01-729-6832
In stock
NSN: 5331-01-729-6832
FSC Code: 5331
MPN: 13118708

5331-01-729-6609 (2-024S604-70)

NIIN: 01-729-6609
In stock
NSN: 5331-01-729-6609
FSC Code: 5331
MPN: 2024S60470

5331-01-729-6511 (080-4273-51)

NIIN: 01-729-6511
In stock
NSN: 5331-01-729-6511
FSC Code: 5331
MPN: 080427351

5331-01-729-5579 (T15712)

NIIN: 01-729-5579
In stock
NSN: 5331-01-729-5579
FSC Code: 5331
MPN: T15712

5331-01-729-4584 (R527280)

NIIN: 01-729-4584
In stock
NSN: 5331-01-729-4584
FSC Code: 5331
MPN: R527280

5331-01-729-3352 (13-577)

NIIN: 01-729-3352
In stock
NSN: 5331-01-729-3352
FSC Code: 5331
MPN: 13577

5331-01-729-0124 (2-234)

NIIN: 01-729-0124
In stock
NSN: 5331-01-729-0124
FSC Code: 5331
MPN: 2234

5331-01-729-6372 (568215-7)

NIIN: 01-729-6372
In stock
NSN: 5331-01-729-6372
FSC Code: 5331
MPN: 5682157

5331-01-729-6027 (K3VL80, CODE 706)

NIIN: 01-729-6027
In stock
NSN: 5331-01-729-6027
FSC Code: 5331
MPN: K3VL80CODE706

5331-01-729-5573 (MTUX52499101085)

NIIN: 01-729-5573
In stock
NSN: 5331-01-729-5573
FSC Code: 5331
MPN: MTUX52499101085

5331-01-729-2838 (13115352)

NIIN: 01-729-2838
In stock
NSN: 5331-01-729-2838
FSC Code: 5331
MPN: 13115352

5331-01-728-8115 (M83485/1-166)

NIIN: 01-728-8115
In stock
NSN: 5331-01-728-8115
FSC Code: 5331
MPN: M834851166

5331-01-729-6386 (568012-31)

NIIN: 01-729-6386
In stock
NSN: 5331-01-729-6386
FSC Code: 5331
MPN: 56801231

5331-01-729-6045 (K3VL80,CODE 703)

NIIN: 01-729-6045
In stock
NSN: 5331-01-729-6045
FSC Code: 5331
MPN: K3VL80CODE703

5331-01-728-9785 (KSD017628)

NIIN: 01-728-9785
In stock
NSN: 5331-01-728-9785
FSC Code: 5331
MPN: KSD017628

5331-01-728-9676 (2-227VA179-70)

NIIN: 01-728-9676
In stock
NSN: 5331-01-728-9676
FSC Code: 5331
MPN: 2227VA17970

5331-01-728-6297 (01-402-0601)

NIIN: 01-728-6297
In stock
NSN: 5331-01-728-6297
FSC Code: 5331
MPN: 014020601

5331-01-728-5802 (803-1385714-31AF-33)

NIIN: 01-728-5802
In stock
NSN: 5331-01-728-5802
FSC Code: 5331
MPN: 803138571431AF33