Equivalent Standards

ISO 4018 Dimensions for Class C Hexagon Head Screws

Dimension	a	d1	d2	s	shearing
2	0.2	2.3	1.9	0.2	1.5
2.5	0.25	2.8	2.3	0.25	2.4
3	0.25	3.3	2.7	0.3	3.5
4	0.5	4.4	3.4	0.5	8th
5	0.5	5.4	4.4	0.5	10.4
6	0.7	6.4	4.9	0.75	18
8	1.5	8.5	7	0.75	24
10	2	10.5	8.5	1	40
12	2	12.5	10.5	1	48
13	2	13.5	11	1.25	66
16	2	16.5	13.5	1.5	98
21	2	21.5	17.5	2	168