... MWidthWire Gauge (Diameter)BWGInchmmTolerance(mm)3/8"10mm±1.00.7mm - 1452' - 1M27, 26, 25, 24, 231/2"13mm±1.50.7mm - 952' - ... .9mm - 401' - 2M23, 22, 21, 20, 19, 181-1/2"40mm±5.01.0mm - 451' - 2M23, 22, 21, 20, 19, ... 182"50mm±6.01.2mm - 401' - 2M23, 22, 21, 20, 19, 182-1/2 ... "65mm±7.01.0mm - 301' - 2M21, 20, 19, 183"75mm±8.01.4mm - 302' - 2M20 ...