Well Nut 347 Series

Imperial Sizes:

6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, 3/8-16

Metric Sizes:

M3, M4, M5, M6, M8

The Well Nut is a flat head round body rubber blind inserts that is installed when the mating screw is tightened.


Muffles noise and seals out ambient moisture

Isolates electrical conductivity

Isolates galvanic corrosion between dissimilar assembled components