STANDARD BOLT TORQUE SPECIFICATIONS
HOW TO DETERMINE BOLT STRENGTH
Hexagon
head bolt
Hexagon
flange bolt
w/ washer
hexagon bolt
Hexagon
head bolt
Hexagon
flange bolt
w/ washer
hexagon bolt
Hexagon
head bolt
Hexagon
head bolt
INTRODUCTION
Class
Mark
4–
4T
5–
5T
6–
fiT
8–
7T
9–
8T
9T
10–
10T
11–
11T
No mark
No mark
Two
protruding
lines
Two
protruding
lines
Three
protruding
lines
Four
protruding
lines
–
STANDARD BOLT TORQUE SPECIFICATIONS
Stud bolt
Welded bolt
Class
Mark
IN–15