1-8 Castle Nut Zinc 4-40 and it is non-serrated for

and it is non-serrated for a smooth finish

while the zinc finish protects against corrosion

It has a ribbed neck that provides extra holding power and prevents the bolt from turning in the wood

The yellow zinc plating provides excellent corrosion protection

This 3/8-16 finished hex nut is made of steel and has a zinc finish

1-8 Castle Nut Zinc 4-40 and it is non-serrated forThe 1 8 Castle Nut Zinc is a high quality, durable nut that is perfect for a variety of applications. Made from zinc plated steel, this nut is resistant to corrosion and rust, making it ideal for use in outdoor or wet environments. The castle nut design features a series of notches around the circumference, which allows for easy installation and removal using a cotter pin. With its strength and reliability, the 1 8 Castle Nut Zinc is a great choice