4-40 x 3/16 Phil Flat Undercut Thread Cutting Screw Type F Full Thread 18-8 Stainless Steel NQRG It is a heavy hex

It is a heavy hex nut with a chamfered top and bottom

They are made of zinc-plated steel and have a split design that creates a spring action when compressed

This type of screw is commonly used in applications where a strong and secure hold is required

The washer has a split washer design that helps to prevent the fastener from loosening

4-40 x 3/16 Phil Flat Undercut Thread Cutting Screw Type F Full Thread 18-8 Stainless Steel NQRG It is a heavy hex4 40 x 3 16 Phil Flat Undercut Thread Cutting Screw Type F Full Thread 18 8 Stainless Steel These screws are designed for use in metal and plastic applications. They have a flat undercut head that provides a flush, low profile finish. The thread cutting design allows the screw to create its own threads as it is driven into the material, providing a secure and permanent hold. They are made from 18 8 stainless steel, which offers excellent corrosion