How big should plug weld holes be?
How big should plug weld holes be? The minimum diameter of the hole for the plug shall be no less than the thickness of the part containing it plus 5/16(8mm) preferably rounded to the next greater odd 1/16". The maximum width shall equal the minimum width plus 1/8"(3mm) or 2-1/4 times the thickness of the member,which ever is greater. What size are spot welds? Spot welding is primarily used for joining parts that normally upto 3 mm (0.125 in) thickness. Spot-weld diameters range from 3 mm to 12.5 mm (0.125 to 0.5 in) in diameter. Low carbon steel is most...