GB /T 1228 - 2006High Strength Bolts with Large Hexagon Head for Steel Structures

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(Non-preferred) dimensions in parentheses.

GB /T 1228 - 2006

Unit: mm

GB /T 1228 - 2006 High Strength Bolts with Large Hexagon Head for Steel Structures

Unit: mm

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GBT 1228@simple_M12X35

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GBT 1228_M12X35

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GB /T 1228 - 2006 High Strength Bolts with Large Hexagon Head for Steel Structures

Thread Specifications
d

M12

P	Pitch
c	max
c	min
d_a	max
d_s	max
d_s	min
d_w	min
e	min
k	Nominal Size
	max
	min
k₁	min
r	min
s	max
s	min

1.75
0.8
0.4
15.23
12.43
11.57
19.2
22.78
7.5
7.95
7.05
4.9
1.0
21
20.16

thousand-piece steel weight≈kg

49.4

Thread Lengthb

25