1/4-20 x 3/8 Unslotted Indented Hex Washer Thread Cutting Screw Type 1 Fully Threaded Zinc 5/16-18 NTU while the flat washer helps

while the flat washer helps to prevent the screw or bolt from sinking into the material

this screw provides maximum holding power and is suitable for use in wood

It features a 1/4-inch diameter and a length of 4 inches

while the coarse thread provides a strong hold

This 1/2-13 x 1 1/2 inch fully threaded machine screw features an un-slotted indented hex head for a secure grip during installation

1/4-20 x 3/8 Unslotted Indented Hex Washer Thread Cutting Screw Type 1 Fully Threaded Zinc 5/16-18 NTU while the flat washer helps1 4 20 x 3 8 Unslotted Indented Hex Washer Thread Cutting Screw Type 1 Fully Threaded Zinc is a type of screw that is used to fasten two pieces of metal together. It has a 1 4 20 thread, which means that it has 20 threads per inch and a diameter of 1 4 inch. The screw is 3 8 inches long and has a fully threaded shank. It has an un slotted indented hex washer head, which means that it has a hexagonal head with no slot and a washer like flange