1/4-20 x 1/2 Ribbed Neck Carriage Bolt Fully Threaded Zinc 1/4-20 and the 7/8 refers to

and the 7/8 refers to the length of the screw

3/8-16 x 2 Hex Cap Screw Silicone Bronze is a high-quality fastener designed for superior performance in demanding applications

The fully threaded design allows for maximum holding power

which prevents it from turning when tightened

This 7/16-14 x 1 1/4 hex cap screw is made of 18-8 stainless steel

1/4-20 x 1/2 Ribbed Neck Carriage Bolt Fully Threaded Zinc 1/4-20 and the 7/8 refers toThis 1 4 20 x 1 2 ribbed neck carriage bolt is made of steel and has a zinc finish. It is fully threaded and has a ribbed neck for added strength. This bolt is commonly used in wood applications where a strong hold is required. It can also be used in metal applications, but it is important to note that the zinc finish may not provide adequate corrosion resistance in all environments.