More information about the video, more episodes to watch and to donate, visit https://www.timhunkin.com/a241_component-videos.htm CHAPTERS 0:00 - Start 02:59 - Screw tapping 07:36 - Die cutting 10:02 - Screw cutting lathes 11:28 - Screw originating 16:48 - Thread standards 19:19 - Bolt heads 21:10 - Bolt varieties 25:32 - Torque 30:41 - Countersinking 33:52 - Stripped threads 38:35 - Wood screws 41:19 - Self tappers 43:39 - Castle threads 44:59 - Precision threads 46:42 - Bolted frames 51:04 - Bolt extraction