Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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How To Determine Nut Strength

SPECIFICATIONS: STANDARD BOLT: HOW TO DETERMINE NUT STRENGTH

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