1/4-15 x 1 Phillips Pan High Low Screw Fully Threaded Black Zinc and Bake AST while the 6-lobe drive helps

while the 6-lobe drive helps to prevent cam-out

These 8-15 x 1 Phillips Round Self Tapping Screw Type A Fully Threaded Zinc are designed for use in a variety of applications

4-20 x 1 Phillips Flat Plastite Alternative 48-2 Fully Threaded Zinc And Wax

These 12-11 x 1/2 Phillips pan self-tapping screws are Type A screws

and the 4 1/2 refers to the length of the bolt

1/4-15 x 1 Phillips Pan High Low Screw Fully Threaded Black Zinc and Bake AST while the 6-lobe drive helps1 4 15 x 1 Phillips Pan High Low Screw Fully Threaded Black Zinc and Bake This screw is made of steel and has a black zinc and bake finish. It has a pan head with a Phillips drive and is fully threaded. The screw is 1 inch long and has a diameter of 1 4 inch. It is designed for use in a variety of applications, including woodworking, metalworking, and plasticworking.