Copied! Bolt Torque Chart & Calculator Calculate tightening torque for any bolt — SAE Grade 2/5/8, metric ISO 8.8/10.9/12.9, or stainless steel. Supports UNC, UNF, metric coarse, and metric fine threads. All values computed using T = K × F × d at 75% of proof load per Machinery’s Handbook, 29th Edition. A standard bolt torque chart lists the recommended tightening torque specifications for common bolt sizes and grades. The torque values on this page are calculated from T = K × F × d, where K is the torque coefficient (0.20 dry, 0.18 lubricated), F is the target preload at 75%...
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Copied! Tap Drill Size Chart Complete UNC, UNF, and metric ISO tap drill size chart with target drill diameters, nearest standard drill bits, clearance drill sizes, and adjustable thread engagement percentage. All values verified against Machinery’s Handbook, 29th Edition. A tap drill size chart — also called a drill and tap chart — is a reference table that shows the correct drill bit diameter to use before tapping a threaded hole. The drill size is determined by the minor diameter tolerances for the specified thread class. This standard tap drill...
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