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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

Metric High Strength Large Hexagon Head Bolts

BS 4395-1 - 1969

Display drawing:

英标BS 4395-1 - 1969 BS4395-1 4395-1BS Metric High Strength Large Hexagon Head Bolts
Screw Thread
d
(M12) M16 M20 M22 M24 M27 M30 M36
P Pitch
ds max
min
s max
min
e max
min
k max
min
1.75 2 2.5 2.5 3 3 3.5 4
12.7 16.7 20.84 22.84 24.84 27.84 30.84 37
11.3 15.3 19.16 21.16 23.16 26.16 29.16 35
22 27 32 36 41 46 50 60
21.16 26.16 31 35 40 45 49 58.8
25.4 31.2 36.9 41.6 47.3 53.1 57.7 69.3
23.70 29.30 35.03 39.55 45.20 50.85 55.37 66.44
8.45 10.45 13.9 14.9 15.9 17.9 20.05 24.05
7.55 9.55 12.1 13.1 14.1 16.1 17.95 21.95
①,Length of thread b：
When L ≤ 125 mm ，b = 2d + 6 mm ；
When 125 < L ≤ 200 mm，b = 2d + 12 mm ;
When L ＞ 200 mm ，b = 2d + 25 mm 。
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