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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.

5331-01-581-3087 (116620)

NIIN: 01-581-3087
In stock
NSN: 5331-01-581-3087
FSC Code: 5331
MPN: 116620

5331-01-582-0340 (154B3021)

NIIN: 01-582-0340
In stock
NSN: 5331-01-582-0340
FSC Code: 5331
MPN: 154B3021

5331-01-581-6890 (2-044)

NIIN: 01-581-6890
In stock
NSN: 5331-01-581-6890
FSC Code: 5331
MPN: 2044

5331-01-581-6283 (R909085560)

NIIN: 01-581-6283
In stock
NSN: 5331-01-581-6283
FSC Code: 5331
MPN: R909085560

5331-01-581-5856 (YA-5739-15)

NIIN: 01-581-5856
In stock
NSN: 5331-01-581-5856
FSC Code: 5331
MPN: YA573915

5331-01-581-5148 (18KP577)

NIIN: 01-581-5148
In stock
NSN: 5331-01-581-5148
FSC Code: 5331
MPN: 18KP577

5331-01-581-3222 (116621)

NIIN: 01-581-3222
In stock
NSN: 5331-01-581-3222
FSC Code: 5331
MPN: 116621

5331-01-581-2986 (410-14938)

NIIN: 01-581-2986
In stock
NSN: 5331-01-581-2986
FSC Code: 5331
MPN: 41014938

5331-01-581-2148 (OK-S)

NIIN: 01-581-2148
In stock
NSN: 5331-01-581-2148
FSC Code: 5331
MPN: OKS

5331-01-581-1288 (ZMSCE70039)

NIIN: 01-581-1288
In stock
NSN: 5331-01-581-1288
FSC Code: 5331
MPN: ZMSCE70039

5331-01-580-9933 (675C-10209)

NIIN: 01-580-9933
In stock
NSN: 5331-01-580-9933
FSC Code: 5331
MPN: 675C10209

5331-01-580-9364 (M83461/1-284)

NIIN: 01-580-9364
In stock
NSN: 5331-01-580-9364
FSC Code: 5331
MPN: M834611284

5331-01-581-7325 (2506277C1)

NIIN: 01-581-7325
In stock
NSN: 5331-01-581-7325
FSC Code: 5331
MPN: 2506277C1

5331-01-581-1606 (M25988/1-206)

NIIN: 01-581-1606
In stock
NSN: 5331-01-581-1606
FSC Code: 5331
MPN: M259881206

5331-01-581-9091 (PH 3916N0552)

NIIN: 01-581-9091
In stock
NSN: 5331-01-581-9091
FSC Code: 5331
MPN: PH3916N0552

5331-01-581-6784 (R909154053)

NIIN: 01-581-6784
In stock
NSN: 5331-01-581-6784
FSC Code: 5331
MPN: R909154053

5331-01-581-0447 (423517)

NIIN: 01-581-0447
In stock
NSN: 5331-01-581-0447
FSC Code: 5331
MPN: 423517

5331-01-581-2847 (AS3208-7)

NIIN: 01-581-2847
In stock
NSN: 5331-01-581-2847
FSC Code: 5331
MPN: AS32087

5331-01-581-2234 (97386)

NIIN: 01-581-2234
In stock
NSN: 5331-01-581-2234
FSC Code: 5331
MPN: 97386

5331-01-581-1320 (013)

NIIN: 01-581-1320
In stock
NSN: 5331-01-581-1320
FSC Code: 5331
MPN: 013

5331-01-581-1044 (2110404)

NIIN: 01-581-1044
In stock
NSN: 5331-01-581-1044
FSC Code: 5331
MPN: 2110404

5331-01-581-0657 (894157-8850)

NIIN: 01-581-0657
In stock
NSN: 5331-01-581-0657
FSC Code: 5331
MPN: 8941578850

5331-01-581-8890 (158)

NIIN: 01-581-8890
In stock
NSN: 5331-01-581-8890
FSC Code: 5331
MPN: 158

5331-01-581-8266 (5-13-7746-1)

NIIN: 01-581-8266
In stock
NSN: 5331-01-581-8266
FSC Code: 5331
MPN: 51377461

5331-01-581-8220 (2661058A112)

NIIN: 01-581-8220
In stock
NSN: 5331-01-581-8220
FSC Code: 5331
MPN: 2661058A112

5331-01-581-6866 (R909087938)

NIIN: 01-581-6866
In stock
NSN: 5331-01-581-6866
FSC Code: 5331
MPN: R909087938

5331-01-581-3935 (AS3581-207)

NIIN: 01-581-3935
In stock
NSN: 5331-01-581-3935
FSC Code: 5331
MPN: AS3581207

5331-01-581-1295 (25-855423)

NIIN: 01-581-1295
In stock
NSN: 5331-01-581-1295
FSC Code: 5331
MPN: 25855423

5331-01-580-9853 (10012553)

NIIN: 01-580-9853
In stock
NSN: 5331-01-580-9853
FSC Code: 5331
MPN: 10012553

5331-01-581-4515 (63 153 01-S)

NIIN: 01-581-4515
In stock
NSN: 5331-01-581-4515
FSC Code: 5331
MPN: 6315301S

5331-01-580-9810 (C-3317-135-2)

NIIN: 01-580-9810
In stock
NSN: 5331-01-580-9810
FSC Code: 5331
MPN: C33171352

5331-01-580-9554 (7X4802)

NIIN: 01-580-9554
In stock
NSN: 5331-01-580-9554
FSC Code: 5331
MPN: 7X4802

5331-01-581-3924 (25-883593A1)

NIIN: 01-581-3924
In stock
NSN: 5331-01-581-3924
FSC Code: 5331
MPN: 25883593A1

5331-01-581-3070 (68620430-0)

NIIN: 01-581-3070
In stock
NSN: 5331-01-581-3070
FSC Code: 5331
MPN: 686204300

5331-01-581-0653 (894157-8860)

NIIN: 01-581-0653
In stock
NSN: 5331-01-581-0653
FSC Code: 5331
MPN: 8941578860

5331-01-581-6888 (B0612 2-031)

NIIN: 01-581-6888
In stock
NSN: 5331-01-581-6888
FSC Code: 5331
MPN: B06122031

5331-01-581-6762 (151118)

NIIN: 01-581-6762
In stock
NSN: 5331-01-581-6762
FSC Code: 5331
MPN: 151118

5331-01-581-3078 (410-13465)

NIIN: 01-581-3078
In stock
NSN: 5331-01-581-3078
FSC Code: 5331
MPN: 41013465

5331-01-581-3072 (116637)

NIIN: 01-581-3072
In stock
NSN: 5331-01-581-3072
FSC Code: 5331
MPN: 116637

5331-01-581-3063 (116619)

NIIN: 01-581-3063
In stock
NSN: 5331-01-581-3063
FSC Code: 5331
MPN: 116619

5331-01-581-1030 (00719F)

NIIN: 01-581-1030
In stock
NSN: 5331-01-581-1030
FSC Code: 5331
MPN: 00719F

5331-01-581-0660 (894157-8840)

NIIN: 01-581-0660
In stock
NSN: 5331-01-581-0660
FSC Code: 5331
MPN: 8941578840

5331-01-581-4823 (9821)

NIIN: 01-581-4823
In stock
NSN: 5331-01-581-4823
FSC Code: 5331
MPN: 9821

5331-01-581-3969 (SOS-5100-21PK)

NIIN: 01-581-3969
In stock
NSN: 5331-01-581-3969
FSC Code: 5331
MPN: SOS510021PK

5331-01-580-7224 (2785227)

NIIN: 01-580-7224
In stock
NSN: 5331-01-580-7224
FSC Code: 5331
MPN: 2785227

5331-01-581-5507 (845-7504733-X-32)

NIIN: 01-581-5507
In stock
NSN: 5331-01-581-5507
FSC Code: 5331
MPN: 8457504733X32

5331-01-581-5189 (NF T47-501 A0085GN)

NIIN: 01-581-5189
In stock
NSN: 5331-01-581-5189
FSC Code: 5331
MPN: NFT47501A0085GN

5331-01-581-0240 (1757900)

NIIN: 01-581-0240
In stock
NSN: 5331-01-581-0240
FSC Code: 5331
MPN: 1757900