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Cold Driving of Large Steel for Cold HeadingJ R Thompson 48
What Torque?W C Stewart 25 Hot Forging Practice in the Fastener
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alloy steel American Standard angle applied axial bearing bending bolt and nut bolt head bolt load bolted assembly bolted joints bolted members cap screw carbon steel cent thread clamping force Class clearance coefficient of friction cold heading curve decarburization developed diam driving effect elastic limit elongation Engineer external load failure fastener flange friction gages greater heat treated increased initial bolt tension length lock nut locking devices lubricant major diameter manufacture material mating maximum measured metal method minimum nut threads pitch diameter plates practice pressure production proper reduced resistance rivet riveted joints rolled threads screw threads shank shear shim shown in Figure shows specifications specimens speed strain gages stress concentration stripping strength structural stud Sulphur base oil surface tapped hole temperature tensile strength tensile stress tensile tests thickness thread depth tight tightening tion tolerances tool torque wrench ultimate strength yield point yield strength