Hex Head High Thread Coarse Thread – c/w Bonded Washer

This self-drilling hex head fixing with coarse high thread and bonded washer is specifically engineered for securing composite panels and cladding sheets through insulation into hot rolled steel sections. The coarse thread profile makes it particularly effective for installations where a firm grip into denser substrates is essential. A bonded washer is included to provide a secure, weather-resistant seal at the fixing point. This helps prevent moisture ingress, improving long-term performance in exposed environments such as façades and roofing systems. The high thread section beneath the head adds vital support to the outer sheet, maintaining the visual and structural integrity of the cladding by preventing deformation or crushing under load. This fixing is ideally suited to insulated applications where durability and clean aesthetics are required.

Additional Information

Part No.	Thread size (mm)	Drilling Capacity (mm)	Min/Max Fixture (mm)	Screw Length (mm)
HTCW55085	5.5	1.2 - 4.0	40 - 60	85
HTCW55100	5.5	1.2 - 4.0	50 - 78	100
HTCW55120	5.5	1.2 - 4.0	60 - 100	120
HTCW55130	5.5	1.2 - 4.0	70 - 110	130
HTCW55150	5.5	1.2 - 4.0	70 - 130	150
HTCW55180	5.5	1.2 - 4.0	100 - 160	180
HTCW55200	5.5	1.2 - 4.0	120 - 180	200
HTCW55230	5.5	1.2 - 4.0	150 - 210	230