GSIC - Global Service Information Center

# STANDARD BOLT > HOW TO DETERMINE NUT STRENGTH

Nut Type
Present Standard Hexagon Nut | Old Standard Hexagon Nut | Class
Cold Forging Nut | Cutting Processed Nut
No Mark |  |  | 4N
No Mark (w/ Washer) | No Mark (w/ Washer) | No Mark | 5N (4T)
|  |  | 6N
|  |  | 7N (5T)
|  |  | 8N
|  | No Mark | 10N (7T)
|  |  | 11N
|  |  | 12N

HINT:

1. *: Nut with 1 or more marks on one side surface of the nut.
2. Use the nut with the same number of the nut strength classification or greater than the bolt strength classification number when tightening parts with a bolt and nut.

Example:

1. Bolt = 4T
2. Nut = 4N or more