Cross-Recess, double countersunk head, with patented Star thread and point. Fully threaded.
Material specification: C1022 Carbon Steel, Zinc +Yellow Dry Wax Seal or Zinc + Clear Dry Wax Seal
Recess: No.2 Pozi.
Screws are manufactured and supplied to ISO 9002 standard.
Windows and doors fabricated using our screw range have surpassed the following British Standards BS7412 – corrosion resistance in accordance with BS 7479.
BS6375 Pt.II – particular attention is drawn to our screws exceeding clause 6.5 – resistance to accidental loading.
BS7950 – enhanced security for windows and PAS 023/024 for doors.
Correct screw choice is vital for the attainment of these security standards.
