4-40 x 5/16 Phillips Fillister Head Machine Screw Fully Threaded Zinc 10NCUP188 With its 1/8-27 thread size

With its 1/8-27 thread size and 9/16” AF (across flats) dimension

and machinery applications where reliability and strength are paramount

They have a square head that fits into a square hole in the wood

this screw is ideal for various industrial

and other environments where corrosion resistance is crucial

4-40 x 5/16 Phillips Fillister Head Machine Screw Fully Threaded Zinc 10NCUP188 With its 1/8-27 thread sizeThese 4 40 x 5 16 Phillips Fillister Head Machine Screws are fully threaded and made of zinc plated steel for durability and corrosion resistance. They have a Phillips drive for easy installation and removal, and a fillister head that sits flush with the surface of the material being fastened. These screws are ideal for a wide range of applications, including electronics, appliances, furniture, and more.