We list diameters as nominal screw gauge sizes; if you prefer the metric equivalents : No.2 gauge =2.2mm diameter No.4 gauge =2.9mm diameter No.6 gauge =3.5mm diameter No.8 gauge =4.2mm daimeter No.10gauge =4.8mm diameter No.12gauge =5.5mm diameter No.14gauge =6.3mm diameter
A list of recommended hole sizes for each diameter can be found on the More Info tab.
Please note these sizes are offered as a guide - different materials and conditions of use may mean it neccessary to vary these hole sizes.