Hex Washer Head Self-Drilling Screw, no. 5 point (Heavy Duty Section)

Fixing to Thick Steel
Self drilling screws for steel, each fastener comes with thunder-shot drill points for steady and fast performance. These drill points are capable of drilling through 12.5mm thick steel while effectively clearing out swarf.

Double Thread Features
-Upper thread has a larger diameter and offer better pullout values when fixing thin sheets.
-The knurls on the shank help clear off excess swarf (i.e. metal shavings) which prevents the washers from being damaged, impending the water tightness of the fixing.
-Come in different threadless shank lengths to accommodate for the thickness of the insulation layer below insulated metal sheets.