This is a fully CNC machined brass component designed to replace the original hobbed bolt that is used in several designs of Reprap extruder.
Overall Length: 60mm
Position of drive groove: 25mm from end
Diameter of straight section: 8mm
Diameter at drive groove: 6.35mm
Thread M8 x 16mm long
Accessories: 2x M8 plain nuts, 2x M8 washers, 2x M8 Nylock nuts
This will work with both 3mm or 1.85mm filament.