Hex Head Class 3 Screw with Washer 10g 20mm

Hex washer head type 17 galvanised, 10g, with 12 threads per inch, full thread, 20mm screw with neoprene washer. For fixing to timber. The length is measured from the underside of the head. Class 3 finish to AS3566. Use with a 5/16ths nut setter driver bit such as these.