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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.

5331-99-960-0830 (FRS40217/A155)

NIIN: 99-960-0830
In stock
NSN: 5331-99-960-0830
FSC Code: 5331
MPN: FRS40217A155

5331-00-461-5791 (X01577)

NIIN: 00-461-5791
In stock
NSN: 5331-00-461-5791
FSC Code: 5331
MPN: X01577

5331-99-917-6128 (FRS40317A244)

NIIN: 99-917-6128
In stock
NSN: 5331-99-917-6128
FSC Code: 5331
MPN: FRS40317A244

5331-99-601-0699 (FRS40417A337)

NIIN: 99-601-0699
In stock
NSN: 5331-99-601-0699
FSC Code: 5331
MPN: FRS40417A337

5331-99-771-4196 (FR.10/70)

NIIN: 99-771-4196
In stock
NSN: 5331-99-771-4196
FSC Code: 5331
MPN: FR1070

5331-01-541-4682 (FPP-1220-0021)

NIIN: 01-541-4682
In stock
NSN: 5331-01-541-4682
FSC Code: 5331
MPN: FPP12200021

5331-01-568-8845 (FP2955)

NIIN: 01-568-8845
In stock
NSN: 5331-01-568-8845
FSC Code: 5331
MPN: FP2955

5331-01-554-2823 (MR016X2)

NIIN: 01-554-2823
In stock
NSN: 5331-01-554-2823
FSC Code: 5331
MPN: MR016X2

5331-01-538-1793 (FOPZ9229-A)

NIIN: 01-538-1793
In stock
NSN: 5331-01-538-1793
FSC Code: 5331
MPN: FOPZ9229A

5331-00-457-6919 (WR-3-680-1)

NIIN: 00-457-6919
In stock
NSN: 5331-00-457-6919
FSC Code: 5331
MPN: WR36801

5331-01-545-0849 (FMG3000-VO)

NIIN: 01-545-0849
In stock
NSN: 5331-01-545-0849
FSC Code: 5331
MPN: FMG3000VO

5331-01-370-4763 (FIG-S15F6-316)

NIIN: 01-370-4763
In stock
NSN: 5331-01-370-4763
FSC Code: 5331
MPN: FIGS15F6316

5331-01-355-6726 (G6076681)

NIIN: 01-355-6726
In stock
NSN: 5331-01-355-6726
FSC Code: 5331
MPN: G6076681

5331-01-426-2558 (FI21.72AGB)

NIIN: 01-426-2558
In stock
NSN: 5331-01-426-2558
FSC Code: 5331
MPN: FI2172AGB

5331-01-411-5830 (FIG)

NIIN: 01-411-5830
In stock
NSN: 5331-01-411-5830
FSC Code: 5331
MPN: FIG

5331-01-411-5831 (FIG)

NIIN: 01-411-5831
In stock
NSN: 5331-01-411-5831
FSC Code: 5331
MPN: FIG

5331-01-370-7710 (FIG)

NIIN: 01-370-7710
In stock
NSN: 5331-01-370-7710
FSC Code: 5331
MPN: FIG

5331-01-375-1116 (FHS1819-3)

NIIN: 01-375-1116
In stock
NSN: 5331-01-375-1116
FSC Code: 5331
MPN: FHS18193

5331-99-429-7418 (FH506005)

NIIN: 99-429-7418
In stock
NSN: 5331-99-429-7418
FSC Code: 5331
MPN: FH506005

5331-01-558-7756 (FH-08-D)

NIIN: 01-558-7756
In stock
NSN: 5331-01-558-7756
FSC Code: 5331
MPN: FH08D

5331-01-558-7755 (FH-09-D)

NIIN: 01-558-7755
In stock
NSN: 5331-01-558-7755
FSC Code: 5331
MPN: FH09D

5331-01-428-9233 (FG666011C67)

NIIN: 01-428-9233
In stock
NSN: 5331-01-428-9233
FSC Code: 5331
MPN: FG666011C67

5331-01-385-3364 (FG-317)

NIIN: 01-385-3364
In stock
NSN: 5331-01-385-3364
FSC Code: 5331
MPN: FG317

5331-01-172-5525 (WD1X781)

NIIN: 01-172-5525
In stock
NSN: 5331-01-172-5525
FSC Code: 5331
MPN: WD1X781

5331-01-200-6017 (WC9-3)

NIIN: 01-200-6017
In stock
NSN: 5331-01-200-6017
FSC Code: 5331
MPN: WC93

5331-01-278-1750 (WC-2928)

NIIN: 01-278-1750
In stock
NSN: 5331-01-278-1750
FSC Code: 5331
MPN: WC2928

5331-00-415-6579 (W87227)

NIIN: 00-415-6579
In stock
NSN: 5331-00-415-6579
FSC Code: 5331
MPN: W87227

5331-01-457-3518 (FF9446-19)

NIIN: 01-457-3518
In stock
NSN: 5331-01-457-3518
FSC Code: 5331
MPN: FF944619

5331-01-461-2688 (FF9855-11)

NIIN: 01-461-2688
In stock
NSN: 5331-01-461-2688
FSC Code: 5331
MPN: FF985511

5331-01-492-5639 (FF9446-225)

NIIN: 01-492-5639
In stock
NSN: 5331-01-492-5639
FSC Code: 5331
MPN: FF9446225

5331-01-538-5749 (FF2106/119/75)

NIIN: 01-538-5749
In stock
NSN: 5331-01-538-5749
FSC Code: 5331
MPN: FF210611975

5331-01-312-6975 (W6646753)

NIIN: 01-312-6975
In stock
NSN: 5331-01-312-6975
FSC Code: 5331
MPN: W6646753

5331-00-545-3611 (W5700-8)

NIIN: 00-545-3611
In stock
NSN: 5331-00-545-3611
FSC Code: 5331
MPN: W57008

5331-00-416-8914 (W47227)

NIIN: 00-416-8914
In stock
NSN: 5331-00-416-8914
FSC Code: 5331
MPN: W47227

5331-00-551-3626 (W47227)

NIIN: 00-551-3626
In stock
NSN: 5331-00-551-3626
FSC Code: 5331
MPN: W47227

5331-01-173-6612 (W4-40-40)

NIIN: 01-173-6612
In stock
NSN: 5331-01-173-6612
FSC Code: 5331
MPN: W44040

5331-00-416-8915 (W44721)

NIIN: 00-416-8915
In stock
NSN: 5331-00-416-8915
FSC Code: 5331
MPN: W44721

5331-01-273-9936 (W3758-4)

NIIN: 01-273-9936
In stock
NSN: 5331-01-273-9936
FSC Code: 5331
MPN: W37584

5331-01-127-1362 (W3750-6)

NIIN: 01-127-1362
In stock
NSN: 5331-01-127-1362
FSC Code: 5331
MPN: W37506

5331-00-790-6305 (W3744-4)

NIIN: 00-790-6305
In stock
NSN: 5331-00-790-6305
FSC Code: 5331
MPN: W37444

5331-01-133-4502 (W3748-4)

NIIN: 01-133-4502
In stock
NSN: 5331-01-133-4502
FSC Code: 5331
MPN: W37484

5331-01-320-2365 (W3740-2)

NIIN: 01-320-2365
In stock
NSN: 5331-01-320-2365
FSC Code: 5331
MPN: W37402

5331-00-132-1447 (W3712-2)

NIIN: 00-132-1447
In stock
NSN: 5331-00-132-1447
FSC Code: 5331
MPN: W37122

5331-01-145-1168 (W3726-4)

NIIN: 01-145-1168
In stock
NSN: 5331-01-145-1168
FSC Code: 5331
MPN: W37264

5331-00-150-4774 (W37116-4)

NIIN: 00-150-4774
In stock
NSN: 5331-00-150-4774
FSC Code: 5331
MPN: W371164

5331-01-128-5181 (W3714-2)

NIIN: 01-128-5181
In stock
NSN: 5331-01-128-5181
FSC Code: 5331
MPN: W37142

5331-01-127-1363 (W3718-4)

NIIN: 01-127-1363
In stock
NSN: 5331-01-127-1363
FSC Code: 5331
MPN: W37184

5331-00-917-9762 (W3716-4)

NIIN: 00-917-9762
In stock
NSN: 5331-00-917-9762
FSC Code: 5331
MPN: W37164