•   Hex Head Self  Drilling Roofing Screws

A six sided head for use with a wrench with an attached metal and neoprene sealing washer and a drill bit point.

•     Specification        

1)Standard: DIN, ASTM,AS,GB

2)Material: Carbon Steel,SUS

3)Diameter: 3.5mm~6.3mm, 6#~14#

4)Length: 9.5~110mm, 3/8"~4-1/2"

5)Thread: AB TYPE,A TYPE

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