Coarse has fewer threads per inch than fine threads and demands fewer turns to tighten totally. Coarse-threaded fasteners are more widespread than other kinds and so are more unlikely to cross-strip or jam. Carriage bolts fasten steel pieces to metallic areas or metallic to wood. They've shallow semi-spherical heads and https://victori009dij3.blogars.com/27670648/the-basic-principles-of-step-bolt