Zinc plated steel No. 10 x 1/2 in. pan head square drive sheet metal screws in Invincibox™. Bit size No. 2. Package of 100.
Dottie square drive pan head sheet metal screws will tap their own mating threads when driven into preformed holes in metal. Square drive screws provide a positive grip and resist cam out. Length is determined from the base of the fastener head.