The ZORO SELECT - U04100.037.0425 is a Hex Head Cap Screw, a type of fastener characterized by its hexagonal-shaped head. Constructed of steel and coated with black oxide, designed to improve durability and corrosion resistance, this screw complies with the ASME B18.2.1 dimensional standards ensuring compatibility in various industrial applications. Drive: The external hex drive requires a wrench or socket of the same shape for installation or removal.Fastener Length: With a length of 4-1/4 inches, this is the maximum depth it can reach when inserted into material.Globally Sourced: Procured from international manufacturers, providing diverse range of quality and price options.Material Grade/Class: Complies with Grade 8 standards which specify certain levels of strength, hardness, and resistance properties.Rockwell Hardness: A Rockwell Hardness rating of HRC33 is indicative of its potential performance under specific conditions.Tensile Strength: Has a reported tensile strength at 150,000 psi; actual performance may vary based on use conditions.Thread Direction & Size: Features right-hand thread direction that tightens clockwise; has a thread size of 3/8"-16. Compatibility depends on matching sizes between screw threads and nuts or holes