1/4-20 x 3/4 6-Lobe Pan Taptite Alternative Thread Rolling Screw Fully Thrd Black Oxide & Wax KTT They are made of zinc-plated

They are made of zinc-plated steel and have a 10-32 thread size

#2 Medium Split Lock Washer Black Zinc and Bake

while the Type U drive allows for easy installation with a square drive bit

This 5/16-18 x 1 6-Lobe Flat Machine Screw is fully threaded and made of zinc-plated steel

1/4-20 x 3/4 6-Lobe Pan Taptite Alternative Thread Rolling Screw Fully Thrd Black Oxide & Wax KTT They are made of zinc-platedThis 1 4 20 x 3 4 6 Lobe Pan Taptite Alternative Thread Rolling Screw is a high performance fastener designed to provide superior holding power and resistance to vibration and loosening. It features a 6 lobe drive that allows for easy installation and removal, even in tight spaces. The thread rolling design creates strong threads in the mating material, eliminating the need for tapping and reducing installation time. The fully threaded body provides