STANDARD BOLT
&
NUT TIGHTENING TORQUE
Standard bolt and nut ttghtening torques are not ~ndicated
Therefore, judge the tightening torque as descr~bed below
1
Find out the type of bolt from the list below Then, judge the bolt tightenrng torque from the
tightening torque table
2
The nut tightening torque can be judged in the same way according to the type of the mating
bolt
DlSRlMlNATlON OF BOLT STRENGTH
1
Discriminat~on by actual bolt
2
Discrimination by part number
1
Shape and
description
I
Strength
code
4=4T
1
Number in relief or 5=5T
Hexagon
I
hallmark on head 6=6T
bolt
I
I
I
7=7T
Standard
;
I
I
Hexagon bolt
/
I
Part number example
3
-
4 06 0
L-
Nominal size
(mm)
l~om~nal dlameter
Length
to
bottom surface of head
Stud bolt1
Part number example
92132
-
4 06 14
under head
imm)
L
;;;nai siz;
Strength code
Nomlnal d~ameter
Length
BAHS2
head
I
No mark
I
1
Hexagon
bolt
head
I
I
I
Hexagon
1
I
1
I
Bolt with two relief
Standard
I
llnes on head
6T
bolt
Hexagon
bolt
Collar
head
I
I
Hexagon
1
1
Boit w~th three relief
7T
bolt
llnes on head
!
I
I
BAHS28
I
I
I
I
Bolt with two relief
I
nes on head
I
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