Especially useful in metal-to-metal or where heavy duty fastening is required.40 x 20 mm Phillips Flat Machine Screw, Zinc Plated Steel, 20 PK Commonly used with flat or lockwashers. Machine screws are used in fastening nearly all types of hard materials..
1/4"-20 x 1 in Phillips Pan Machine Screw, Zinc Plated Steel, 25 PK Commonly used with flat or lockwashers.. Especially useful in metal-to-metal or where heavy duty fastening is required. Machine screws are used in fastening nearly all types of hard materials.