Screw Specifications
SDST (Self Drilling Self Tapping) screws
Standard AS 3566
The AS 3566 is a standard established by the Standard Association of Australia to specify the requirement for a Self Drilling Screw to be suitable for use in Steel and Timber purlins.
Grade
Class 3 Coating is a unique anti-corrosive coating system consisting of 3 distinct layers which combine to give exceptional protection.
Anti Corrosive Test
1000 Hours Salt Spray test done by Regional Testing Center( Govt. of India) New Delhi and Sriram Institute for Industrial Research- New Delhi.
Coated with Xylan to prevent rusting.
SDST (Self Drilling Self Tapping) screws
Corrosion proof SDST(Self Drilling Self Tapping) screws with EPDM washers ensure a strong and weather-tight attachement.
PVC Color Caps
PVC Colour Caps are provided to match with the colour of the sheets for an aesthetic look.
Base Materials
Carbon Steel Grade-1022
13RE Drilling Machine
Tek points of SDST screws act as a drilling bit, with the help of 13RE drilling machine it gets drilled and tap their own threads into purlins.
Summary
Self Drilling,self tapping screws is highly suitable for steel and timber purlins. Unique anti-corrosive coating system and Xylan coating prevents rusting and ensures weather type attachment.