Hex Washer Head Self Drilling Roof Screw With EPDM Washer
Hex Washer Head Self Drilling Roof Screw With EPDM Washer
Tapping Screws – Self Drilling Roof Screws:
Standard: ASME B18.6.4 & SAE J78 DIN7504K, DIN7504P,DIN7504N
Size: #4(2.8)-1/2″, Length: 10-250mm (3/8”- 7”)
Head type: Hex headwith EPDM washer ，EPDM washer gives a firm hold and prevents water leaks.
Drill point: #2, #3 #5
Material: C1022+ heat treatment
Finish: zinc plated(clear/bule/yellow), black/grey phosphate,nickel, Ruspert, Dacromet
These hexagonal head self-drilling roof screws are used to fix light section purlins and also to join steel to steel or timber to metal. The screws are strong enough to penetrate timber, sheet metal and plastic.
The flanged hexagonal heads self-drilling roof screws also make roofing work easier as they allow the use of tools in tight locations. These roofing screws have rubber washers of different sizes which expand under pressure to form a permanent watertight joint. They are ideally suited to roofs in exposed positions, even in coastal areas where salt can be a problem.
