http://www.boltingmachine.info Bolting Machine for mining, tunneling and construction industry. Tue, 05 Feb 2008 11:58:35 +0000 http://backend.userland.com/rss092 en A universally recognized distinction between a screw and a bolt is absent. Screws are more than meagre screws, most of the time. In common usage, the term "screw" refers to small (less than 1 / 4 inch) screw thread, especially with threaded screw cone waves and the word "screw" refers to ... http://www.boltingmachine.info/bolts/