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Unit:mm

Cold heading dies for hexagon bolts - Reducing dies full threads, Type C, (Suitable for GB5786)

JB /T 4209.9 - 1996

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机械行业JB /T4209.9 - 1996 JB4209.9 4209.9JB Cold heading dies for hexagon bolts - Reducing dies full threads, Type C, (Suitable for GB5786)

Thread Size

M8
×1

M10
×1

M12
×1.5

M14
×1.5

M16
×1.5

M18
×1.5

M20
×2

d	min=nominal size
	max
d₁	min=nominal size
	max
d₃	min=nominal size
	max
c	min=nominal size
	max
D	Nominal Size
	max
	min
D₂	Nominal Size
	max
	min
L	max=nominal size
	min
d₂	Increase value compared with d actual size
D₁
h
h₁
r
t	Round beating
	Coaxiality
	verticality

7.24	9.24	10.89	12.89	14.89	16.89	18.53
7.262	9.262	10.917	12.917	14.917	16.917	18.563
8	10	12	14	16	18	20
8.09	10.09	12.11	14.11	16.11	18.11	20.13
11.7	14.7	16.7	19.7	22.6	25.4	28.3
11.81	14.81	16.81	19.83	22.73	25.53	28.43
0.35	0.35	0.35	0.35	0.5	0.5	0.5
0.45	0.45	0.45	0.45	0.6	0.6	0.6
38	48	48	62	62	78	78
38.085	48.095	48.095	62.117	62.117	78.132	78.132
38.06	48.07	48.07	62.087	62.087	78.102	78.102
36.6	46	46	59.5	59.5	75	75
36.705	46.122	46.122	59.652	59.652	75.176	75.176
36.68	46.097	46.097	59.622	59.622	75.146	75.146
42	52	52	66	66	80	80
41.9	51.88	51.88	65.88	65.88	79.88	79.88
0.03~0.05	0.03~0.05	0.03~0.05	0.04~0.06	0.04~0.06	0.05~0.07	0.05~0.07
22	30	30	40	40	45	45
0.8	1	1.2	1.4	1.6	1.8	2
1.79	1.79	2.61	2.61	2.61	2.61	3.46
0.4	0.4	0.6	0.6	0.6	0.8	0.8
0.06	0.06	0.06	0.08	0.08	0.08	0.08
0.06	0.06	0.06	0.08	0.08	0.08	0.08
0.04	0.05	0.05	0.05	0.05	0.06	0.06

Alternative history

JB /T 4209.9 - 1996 JB /T 4209.4 - 2014

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