How To Determine Nut Strength

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

Nut Type

Fig 1: Nuts Specification Chart

G05749366

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