Tapping screws with cylindrical head, with socket or six lobe recess

Dimensions in mm
d thread size	4.8	5.5	6.3
k max	5	6	6
dk max	8.72	10.22	10.22
s	4	5	5

Approximate mass, in kg x1000 pcs, (ρ=7,85 kg/dm3)
d thread size	4.8	5.5	6.3
nominal length l
16	0.376	0.57	0.644
19	0.405	0.608	0.695
22	0.433	0.646	0.747
25	0.462	0.684	0.8
32	0.529	0.772	0.92
38	0.587	0.847	1.022
45	0.654	0.936	1.143
50	0.702	1	1.23