A straight shank fastener with external threads designed to go through a hole or nut that is pre-tapped to form a mating thread for the screw. 10 Hex Nut Zinc [100 pieces] ... Get a custom quote today! 3-48 Hex Machine Screw Nut Zinc Yellow [10000 pieces] 3-48 Hex Machine Screw Nut Zinc Yellow [10000 per... Hot Selling Assembled Indented Phillips Hex Head Screws with Flat Washer and Spring Washer... Machine Screws 10-32 X 1/2" (FT) Fine Thread Machine Screw Hex Head Stainless Steel 18-8 Zinc Green Finish Machine Screws Machine Screws, Indented Hex Head, Phillips Drive, #10-24 X 1/2 in