Course 8 is medium-strength steel with superior ductility and workability, and it is made use of on most sorts of kit. Carriage bolts fasten steel sections to metallic sections or metallic to wood. They have got shallow semi-spherical heads and both a square or ribbed (ridged) neck beneath the head https://lanesdlua.blogoscience.com/34260634/the-basic-principles-of-flange-bolts