#7 x 1/2 in. External Hex Flange Hex-Head Sheet Metal Screw (50-Bag)
Malco. $10.49. In stock.
HDZD is the number 1 sheet metal screw for professionals. 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. A single starting thread is formed down to the very tip of the point and is the source of Zip-In's penetrating power. A second thread above the point engages after initial penetration and drills in the screw double fast. Zip-In screws are faster driving, with a greater capacity for fastening heavier gauges of sheet metal than any other self-piercing type.
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