use 5mm hex bit recomend 14 gauge smart bit for perfect hole and countersink.
Batten screws 5mm internal hex drive 14 gauge x100 mm long grade 304 stainless steel price is per single screw
Click here to go to Galvanized Batten Screws
Pilot drill / countersink bit for these products click here
Drills pilot hole and countersinks for 14 gauge batten screw plus 2 spare pilot drills.
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Internal hex drive batten screws galvanised 14x150 each
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Batten screws 5mm internal hex drive 14 gauge x150 mm long grade 304 stainless steel price is per single screw
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