nominal size	1.7	1.8	2.2	2.5	2.7	2.8	3.2	3.7	4.3	5.3
nominal size	6.4	7.4	8.4	10.5	13	15	17	19	21	23

nominal size	5.5	6.6	7.6	9	11	13.5	15.5	17.5	20	22	24
nominal size	26	30	33	36	39	42	45	48	52	56

nominal size	3	3.5	4	5	6	7	8	10	12
nominal size	14	16	18	20	22	24	27	30

nominal size	1/8	5/32	3/16	1/4	5/16	3/8	7/16	1/2
nominal size	9/16	5/8	3/4	7/8	1	1 1/8	1 1/4	1 1/2

for screws	m8	m10	m12	m16	m20	m22	m24	m27