Skip to content

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.

5331-01-162-8403 (3G9055)

NIIN: 01-162-8403
In stock
NSN: 5331-01-162-8403
FSC Code: 5331
MPN: 3G9055

5331-01-127-3652 (3G2242)

NIIN: 01-127-3652
In stock
NSN: 5331-01-127-3652
FSC Code: 5331
MPN: 3G2242

5331-00-133-1435 (3G2/135ITEM10)

NIIN: 00-133-1435
In stock
NSN: 5331-00-133-1435
FSC Code: 5331
MPN: 3G2135ITEM10

5331-01-130-0473 (3G2240)

NIIN: 01-130-0473
In stock
NSN: 5331-01-130-0473
FSC Code: 5331
MPN: 3G2240

5331-01-080-9070 (3G1209)

NIIN: 01-080-9070
In stock
NSN: 5331-01-080-9070
FSC Code: 5331
MPN: 3G1209

5331-00-286-7296 (3F9141)

NIIN: 00-286-7296
In stock
NSN: 5331-00-286-7296
FSC Code: 5331
MPN: 3F9141

5331-01-081-5010 (3FC611)

NIIN: 01-081-5010
In stock
NSN: 5331-01-081-5010
FSC Code: 5331
MPN: 3FC611

5331-01-424-1853 (129-000)

NIIN: 01-424-1853
In stock
NSN: 5331-01-424-1853
FSC Code: 5331
MPN: 129000

5331-00-240-1952 (3F3759)

NIIN: 00-240-1952
In stock
NSN: 5331-00-240-1952
FSC Code: 5331
MPN: 3F3759

5331-00-426-4562 (3F1547)

NIIN: 00-426-4562
In stock
NSN: 5331-00-426-4562
FSC Code: 5331
MPN: 3F1547

5331-01-251-2937 (3D-912)

NIIN: 01-251-2937
In stock
NSN: 5331-01-251-2937
FSC Code: 5331
MPN: 3D912

5331-01-424-3489 (128N)

NIIN: 01-424-3489
In stock
NSN: 5331-01-424-3489
FSC Code: 5331
MPN: 128N

5331-00-498-7625 (3CGB74X732)

NIIN: 00-498-7625
In stock
NSN: 5331-00-498-7625
FSC Code: 5331
MPN: 3CGB74X732

5331-00-291-4858 (3CA147)

NIIN: 00-291-4858
In stock
NSN: 5331-00-291-4858
FSC Code: 5331
MPN: 3CA147

5331-01-322-2576 (3C3408P16)

NIIN: 01-322-2576
In stock
NSN: 5331-01-322-2576
FSC Code: 5331
MPN: 3C3408P16

5331-00-292-1462 (3C35)

NIIN: 00-292-1462
In stock
NSN: 5331-00-292-1462
FSC Code: 5331
MPN: 3C35

5331-01-320-8113 (3C3408P14)

NIIN: 01-320-8113
In stock
NSN: 5331-01-320-8113
FSC Code: 5331
MPN: 3C3408P14

5331-01-319-2133 (3C3408P15)

NIIN: 01-319-2133
In stock
NSN: 5331-01-319-2133
FSC Code: 5331
MPN: 3C3408P15

5331-01-315-8883 (3C3160P80)

NIIN: 01-315-8883
In stock
NSN: 5331-01-315-8883
FSC Code: 5331
MPN: 3C3160P80

5331-01-218-1178 (3C3160P07)

NIIN: 01-218-1178
In stock
NSN: 5331-01-218-1178
FSC Code: 5331
MPN: 3C3160P07

5331-01-218-1181 (3C3160P21)

NIIN: 01-218-1181
In stock
NSN: 5331-01-218-1181
FSC Code: 5331
MPN: 3C3160P21

5331-01-218-1180 (3C3160P15)

NIIN: 01-218-1180
In stock
NSN: 5331-01-218-1180
FSC Code: 5331
MPN: 3C3160P15

5331-01-218-1179 (3C3160P14)

NIIN: 01-218-1179
In stock
NSN: 5331-01-218-1179
FSC Code: 5331
MPN: 3C3160P14

5331-01-218-1183 (3C3152P17)

NIIN: 01-218-1183
In stock
NSN: 5331-01-218-1183
FSC Code: 5331
MPN: 3C3152P17

5331-01-218-1182 (3C3152P16)

NIIN: 01-218-1182
In stock
NSN: 5331-01-218-1182
FSC Code: 5331
MPN: 3C3152P16

5331-01-223-6761 (3C3152P15)

NIIN: 01-223-6761
In stock
NSN: 5331-01-223-6761
FSC Code: 5331
MPN: 3C3152P15

5331-01-207-0265 (3C3146P07)

NIIN: 01-207-0265
In stock
NSN: 5331-01-207-0265
FSC Code: 5331
MPN: 3C3146P07

5331-00-377-8733 (3B8453)

NIIN: 00-377-8733
In stock
NSN: 5331-00-377-8733
FSC Code: 5331
MPN: 3B8453

5331-01-491-6187 (12-8775N128)

NIIN: 01-491-6187
In stock
NSN: 5331-01-491-6187
FSC Code: 5331
MPN: 128775N128

5331-01-077-5233 (3B3M)

NIIN: 01-077-5233
In stock
NSN: 5331-01-077-5233
FSC Code: 5331
MPN: 3B3M

5331-00-586-4623 (3B154)

NIIN: 00-586-4623
In stock
NSN: 5331-00-586-4623
FSC Code: 5331
MPN: 3B154

5331-01-308-5846 (3ABUNA)

NIIN: 01-308-5846
In stock
NSN: 5331-01-308-5846
FSC Code: 5331
MPN: 3ABUNA

5331-01-221-9642 (3A9466)

NIIN: 01-221-9642
In stock
NSN: 5331-01-221-9642
FSC Code: 5331
MPN: 3A9466

5331-01-181-2430 (3A9127)

NIIN: 01-181-2430
In stock
NSN: 5331-01-181-2430
FSC Code: 5331
MPN: 3A9127

5331-01-101-4773 (3A9119)

NIIN: 01-101-4773
In stock
NSN: 5331-01-101-4773
FSC Code: 5331
MPN: 3A9119

5331-01-313-5697 (3A404016)

NIIN: 01-313-5697
In stock
NSN: 5331-01-313-5697
FSC Code: 5331
MPN: 3A404016

5331-01-313-5700 (3A404017)

NIIN: 01-313-5700
In stock
NSN: 5331-01-313-5700
FSC Code: 5331
MPN: 3A404017

5331-01-313-5696 (3A404020)

NIIN: 01-313-5696
In stock
NSN: 5331-01-313-5696
FSC Code: 5331
MPN: 3A404020

5331-01-313-5681 (3A404019)

NIIN: 01-313-5681
In stock
NSN: 5331-01-313-5681
FSC Code: 5331
MPN: 3A404019

5331-01-313-5698 (3A404015)

NIIN: 01-313-5698
In stock
NSN: 5331-01-313-5698
FSC Code: 5331
MPN: 3A404015

5331-01-550-0066 (128484A1)

NIIN: 01-550-0066
In stock
NSN: 5331-01-550-0066
FSC Code: 5331
MPN: 128484A1

5331-01-549-6017 (128485A1)

NIIN: 01-549-6017
In stock
NSN: 5331-01-549-6017
FSC Code: 5331
MPN: 128485A1

5331-01-549-6022 (128483A1)

NIIN: 01-549-6022
In stock
NSN: 5331-01-549-6022
FSC Code: 5331
MPN: 128483A1

5331-01-546-9284 (128376A1)

NIIN: 01-546-9284
In stock
NSN: 5331-01-546-9284
FSC Code: 5331
MPN: 128376A1

5331-01-251-2936 (3A-212)

NIIN: 01-251-2936
In stock
NSN: 5331-01-251-2936
FSC Code: 5331
MPN: 3A212

5331-01-020-0949 (3A)

NIIN: 01-020-0949
In stock
NSN: 5331-01-020-0949
FSC Code: 5331
MPN: 3A

5331-01-093-7813 (3A)

NIIN: 01-093-7813
In stock
NSN: 5331-01-093-7813
FSC Code: 5331
MPN: 3A

5331-00-237-7376 (39M79)

NIIN: 00-237-7376
In stock
NSN: 5331-00-237-7376
FSC Code: 5331
MPN: 39M79