The Type 17 Screw has a course tapping thread and a special long sharp fluted point for self drilling into timber.
Timbertite screws have a Hex flange head and these can come with or without a neoprene sealing washer.
12 gauge diameter = 5.6mm Thread = 11 TPI Hexagon head size = 5/16"
Use with a Magnetic Socket
Magnetic Sockets aka Nut Setters are predominantly used in the roofing industry to drive hex flange headed screws.
