Page text (OCR transcript)
IN–42
INTRODUCTION – STANDARD BOLT TORQUE SPECIFICATIONS
STANDARD BOLT TORQUE SPECIFICATIONS
HOW TO DETERMINE BOLT STRENGTH
Mark | Class | Mark | Class
Hexagon
head bolt
4 – 4T
5 – 5T
Bolt 6 – 6T
head No. 7 – 7T
8 – 8T
9 – 9T
10 – 10T
11 – 11T
No mark 4T
Stud bolt
No mark
4T
Hexagon
flange bolt
w/ washer
hexagon bolt
No mark 4T
Grooved
6T
Hexagon
head bolt
2
protruding
lines 5T
Hexagon
flange bolt
w/ washer
hexagon bolt
2
protruding
lines 6T
Welded bolt
Hexagon
head bolt
3
protruding
lines 7T
4T
Hexagon
head bolt
4
protruding
lines 8T
