Click Specification

(Non-preferred) dimensions in parentheses.

Metric Round Head Square Neck Bolts with Large Head

ASME/ANSI B 18.5.2.3M - 1990

Display drawing:

Nominal Length L Tips:seclect Nominal Length L and get Thread length.

Thread Size
d

M10

M12

M16

M20

P	Pitch
b	L≤125
	125＜L≤200
	200＜L
d_k	max
d_k	min
d_s	max
d_s	min
e	min
k₁	max
k₁	min
k	max
k	min
r	max
s	max
s	min

0.8	1	1.25	1.5	1.75	2	2.5
16	18	22	26	30	38	46
22	24	28	32	36	44	52
35	37	41	45	49	57	65
13	16	20	24	30	38	46
11.9	14.9	18.7	22.7	28.7	36.4	44.4
5.48	6.48	8.58	10.58	12.70	16.70	20.84
4.36	5.21	7.04	8.86	10.68	14.50	18.16
5.9	7.2	9.6	12.2	14.7	19.9	24.9
4.1	4.6	5.6	6.6	8.8	12.9	15.9
2.9	3.4	4.4	5.4	7.2	11.1	14.1
3.1	3.6	4.8	5.8	6.8	8.9	10.9
2.5	3.0	4.0	5.0	6.0	8.0	10.0
0.4	0.5	0.8	0.8	1.2	1.2	1.6
5.48	6.48	8.58	10.58	12.70	16.70	20.84
4.52	5.52	7.42	9.42	11.30	15.30	19.16

Length of Thread b

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