#8-32 x 1-1/4 in Slotted Hex Machine Screw, Zinc Plated Steel, 20 PK Machine screws are used in fastening nearly all types of hard materials.. Especially useful in metal-to-metal or where heavy duty fastening is required.
.Sheet Metal Screw, #7 x 1/2 in, Zinc Plated Steel Hex Head Slotted Drive, 48 PK A sheet metal screw has sharp threads that cut into a material such as sheet metal, plastic, wood, hard rubber, aluminum, and other comparable compositions.