A unique thread design and quality controlled manufacture spell the Zip-in� difference.
Zip-in's� sophisticated heat treat process allows the screw to taper to a fine, sharp point without sacrificing critical point strength.
Zip-in�screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-drilling type.
Ultra sharp tapered point will not mushroom, break or walk.
Undercut-indented hex washer slotted head always seats flush.
Self-Piercing Screw, Head Type Hex, Steel, Finish Zinc-Plated, Size #7, Length 1/2 In. , Drive Type Slotted, Driver Size 1/4 In. , Head Dia. 1/4 In. , Head Height 0. 110 In. , Application Sheet Metal Screw, Package Quantity 1000