HEAVY SQUARE NUTS  DIN 557
		All Dimensions in Millimeters
Basic Nut Dia.	Width Across Flats		Thickness	Basic Nut Dia.	Width Across Flats		Thickness
M4-0.7	7.0		3.2	M8-1.25	13.0		6.5
M5-0.8	8.0		4.0	M10-1.5	16.0		8.0
M6-1.0	10.0		5.0	M12-1.75	18.0		10.