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Unit:mm

General parts of cold heading dies for fasteners - Reducing dies, Type B, (Suitable for GB5781、GB5783、GB70)

JB /T 4208.15 - 1996

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机械行业JB /T4208.15 - 1996 JB4208.15 4208.1 General parts of cold heading dies for fasteners - Reducing dies, Type B, (Suitable for GB5781、GB5783、GB70)

Thread Size

M4

M5

M6

M8

M10

M12

M14

M16

M20

d	min=nominal size
	max
d₁	min=nominal size
	max
D	Nominal Size
	max
	min
L	max=nominal size
	min
d₂	比d实际尺寸增加值
D₁
h
h₁	max
r
t	verticality
	Coaxiality

3.46	4.39	5.25	7.07	8.89	10.71	12.53	14.53	18.19
3.478	4.408	5.268	7.092	8.912	10.737	12.557	14.557	18.223
4	5	6	8	10	12	14	16	20
4.075	5.075	6.075	8.09	10.09	12.11	14.11	16.11	20.13
30	30	30	38	48	48	62	62	78
30.069	30.069	30.069	38.085	48.095	48.095	62.117	62.117	78.132
30.048	30.048	30.048	38.06	48.07	48.07	62.087	62.087	78.102
29	34	34	42	52	52	66	66	80
28.916	33.9	33.9	41.9	51.88	51.88	65.88	65.88	79.88
0.02~0.04	0.02~0.04	0.02~0.04	0.03~0.05	0.03~0.05	0.03~0.05	0.04~0.06	0.04~0.06	0.05~0.07
16	16	16	22	30	30	40	40	45
0.4	0.6	0.6	0.8	1	1.2	1.4	1.6	2
1.27	1.44	1.76	2.19	2.61	3.03	3.46	3.46	4.26
0.2	0.2	0.25	0.4	0.4	0.6	0.6	0.6	0.8
0.05	0.05	0.05	0.06	0.06	0.06	0.08	0.08	0.08
0.06	0.06	0.06	0.06	0.08	0.08	0.08	0.08	0.1

Alternative history

JB /T 4208.15 - 1996 JB /T 4208.4 - 2014

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