7" x 1/2" (Length) 1/4" (Head Size) Slotted Hex Washer Head Zip-In Sheet Metal Screws (1,000 Pack)

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.

Features:

• Length: 1/2"
• Number: 7
• Head Size: 1/4"
• Quantity: 1,000
• Undercut-indented hex washer slotted head
• Bright Zinc Plated
• Burr Fee
• Full 1/4" (no 7) head will not strip out of hex driver opening
• One 1/4" hex driver accommodates all sizes
• Undercut - always seats flush
• Combination Lead Double Thread Design
• Single starting thread machined down to very tip of screw point
• Instantly penetrates and engages in heavy gauge sheet metal and layered light gauge
• Consistent Hard Point
• Quality controlled heat treat
• Sharp tapered point will not mushroom or break
• No walking
• Complete operator control - precise hole alignment