tolerance screw tolerance. Determines actual screw thread geometry based on nominal sizing. See tolerance. Default is "2A" for UTS and "6g" for ISO. undersize amount to decrease screw diameter, a ...

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You can give diameter value which specifies the outer diameter and will produce the "basic form" or you can set d to a triplet [d_min, d_pitch, d_major] where are parameters determined by the ISO and ...

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