5/16-18 x 1 1/4 Coarse Thread Flat Socket Cap Screw Plain NCAG188 They feature a 1/4" across

They feature a 1/4" across flats hex washer head for easy driving and a 1/2" slot for use with a screwdriver

312 Flat Head Ribbed Threaded Insert Rivet Nut Aluminum Cleaned and Polished is a high-quality threaded insert designed for use in aluminum applications

which means that it has a diameter of 12-14 and a length of 1/2 inch

while the black oxide finish provides additional protection and a sleek appearance

5/16-18 x 1 1/4 Coarse Thread Flat Socket Cap Screw Plain NCAG188 They feature a 1/4" acrossThe 5 16 18 x 1 1 4 Coarse Thread Flat Socket Cap Screw Plain is a type of screw that is used to fasten two pieces of metal together. It has a hexagonal head with a flat top, and a coarse thread that is designed to provide a strong hold. The screw is made of steel and has a plain finish. It is 1 1 4 inches long and has a diameter of 5 16 inches. The screw is threaded with a 18 threads per inch (TPI) pitch.