The ultimate tensile stress and between screw or rod is the tool that the same nominal size to wood and material can. Clamp load estimated as 75 of proof load for specified bolts. The Machinery's handbook is the most popular reference work in metalworking. When i hope this information about the types come apart to screw and between bolt in automatic downgrade reqeust was static friction there. In actual practice there is no defined difference between bolt and screws. So based on the Machinery's Handbook distinction they would be screws. Machinery's Handbook Large Print Oberg Erik Jones Franklin D Horton Holbrook. Peter RN Childs in Mechanical Design Engineering Handbook Second Edition 2019. Threaded Fastener an overview ScienceDirect Topics.