1/4-20 x 5/16 Slotted Pan Machine Screw Fully Threaded Zinc WUSSG They are made of black

They are made of black phosphate steel for corrosion resistance and have a sharp point for easy penetration

or plastic projects

preventing the washer from loosening or coming off

and it has a hex head

and the coarse thread design ensures a strong hold in drywall

1/4-20 x 5/16 Slotted Pan Machine Screw Fully Threaded Zinc WUSSG They are made of blackThis 1 4 20 x 5 16 Slotted Pan Machine Screw is a fully threaded screw with a slotted drive and a pan head. It is made of zinc plated steel for corrosion resistance and has a length of 5 16 inches. This screw is commonly used in a variety of applications, including fastening metal, plastic, and wood.