4-40 x 1/2 MS51957-B Phil Pan M/S Coarse Full Thread 300 Series S/S DFAR Black Ox FTFB They are made of steel

They are made of steel and have a zinc and bake finish for added durability

They are easy to install and can be used with a variety of tools

The washer helps to distribute the load of the screw and prevent it from damaging the surface of the material it is being screwed into

The washer has a series of teeth on its inner diameter that bite into the surface of the bolt or nut

which means that it will not damage the surface of the material being fastened

4-40 x 1/2 MS51957-B Phil Pan M/S Coarse Full Thread 300 Series S/S DFAR Black Ox FTFB They are made of steelThe 4 40 x 1 2 MS51957 B Phil Pan M S Coarse Full Thread 300 Series S S DFAR Black Ox is a high quality screw designed for use in a variety of applications. The screw is made from 300 series stainless steel, which provides excellent corrosion resistance and durability. The black oxide finish provides additional protection against corrosion and wear. The screw has a coarse thread, which provides a strong hold in a variety of materials. The pan head