Dimensions of ASME B18.5.2.M Metric Round Head Square Neck Bolts with Reduced Body Diameters

Nominal Bolt Diameter, D, and Thread Pitch	Diameter of Reduced Body Dr
	Max	Min
M5 x 0.8	5.00	4.36
M6 x 1	6.00	5.21
M8 x 1.25	8.00	7.04
M10 x 1.5	10.00	8.86
M12 x 1.75	12.00	10.68
M14 x 2	14.00	12.50
M16 x 2	16.00	14.50
M20 x 2.5	20.00	18.16
M24 x 3	24.00	21.80

• All dimensions are in millimeters.