How To Determine Nut Strength

Nut Type 

Fig 1: Nut Classification Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• *: Nut with 1 or more marks on one side surface of the nut.
• Use a nut with the same nut strength classification number (or more) as the bolt strength classification number when tightening parts with a bolt and nut.

Example:

• Bolt = 4T
• Nut = 4N or more