GB /T 5788 - 1986 Hexagon Flange Bolts - Reduced Shank - Product Grade B

Unit: 毫米(mm)

Thread Size
d

P	Pitch
b	L≤125
	125＜L≤200
	L＞200
c	min
d_a	Type A	max
	Type B	max
d_c	max
d_s	max
	min
d_u	max
d_w	min
e	min
f	max
k	max
k₁	min
r₁	min
r₂	max
r₃	min
r₄	Ref.
s	max
	min
t	max
	min

0.8	1	1.25
16	18	22
-	-	28
-	-	-
1	1.1	1.2
5.7	6.8	9.2
6.2	7.4	10
11.4	13.6	17
5	6	8
4.82	5.82	7.78
5.5	6.6	9
9.4	11.6	14.9
7.44	8.56	10.8
1.4	2	2
5.6	6.8	8.5
2.3	2.9	3.8
0.2	0.25	0.4
0.3	0.4	0.5
0.1	0.1	0.15
3	3.4	4.3
7	8	10
6.64	7.64	9.64
0.15	0.2	0.25
0.05	0.05	0.1

Thread Length
b

GB 5787 - 1986

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Wenzhou Fengding Fastener Manufacture Co., Ltd.
Contact:	Mr.Huang
Cellphone：	+86-18857755588 13676725866
email：	wzfdjgj@163.com
Material: carbon steel，copper，Stainless steel; Surface treatment: according to customers' requirements; Grade: 4.8, 8.8, 10.9, 12.9; Nominal diameter: M3-M20; Nominal length: 5-300mm