Product Details

Big head roofing screw with rubber washer with drilling point
Material	Stainless Steel , Carbon Steel
Dimension	As customer's request
Head shapes	Hex head
Driver types	Hex wrench
Screw thread	Self-drill thread
Screw tip	Drill-shaped point
Finish	Plain,Zinc plated, Black-Oxide, Heat treatment
Features	Good anti-corrosion ability
Grade	A2,A4
Certification	ISO9001, ROHS, SGS, CTI
After-sale service	If there are any quality problems, please contact with us at once

Self drilling screw description

Similar to a sheet metal screw, but it has a drill-shaped point to cut through the substrate

to eliminate the need for drilling a pilot hole. Designed for use in soft steel or other metals.

The points are numbered from 1 through 5, the larger the number, the thicker metal it can

go through without a pilot hole. A 5 point can drill a 0.5 in (12.7 mm) of steel, for example.

We are the professional manufacturer of Screws and Rivets,located in zhejiang province.

The biggest advantage of our company is to specialize in producing various kinds of

special screws.So customized fastenters can be made as customer's sample or drawing.