... Outside diameter, inch (mm)Diameter tolerance, inch(mm), +/-Permissible variation in wall thickness, %, +/-<1 (25.4)0.004 (0.102)101~1 ... such as ASTM, AMS, JIS,... (2) Our technical staff involved in the entire production process to ensure high product yield.5 ... .Specific dimension and diameter Table1. Pemissible variations in diameter for rod and wire Diameter, inch (mm)Tolerance, +/- ...