[M3]

■Shape: Hex nut with tooth washer
The seat side of the hex nut is integrated with a tooth washer. When tightening, it has a spring action that allows the teeth to be twisted flat, and the increased friction caused by teeth scratching the opposite material.
The nut and tooth washers are designed to rotate and reduce damage to the original material during installation.
Use a tool such as a spanner or wrench to tighten it.

■ Thread Shape: Coarse
It is the most standard pitch in Japan as prescribed by ISO (International Organization for Standardization) standard. The most frequent distribution in Japan.

■Material: Iron
"Iron" is "steel" and is an alloy of iron containing carbon.
Although it is commonly used in many circulations, it is cheap materials, but due to the downside of it is easy to rust, many surface treatments will reduce corrosion.

■Surface treatment: Nickel
Widely used for decoration plating to give it a shiny shine. However, it is not as rust resistant as electrogalvanized and chromate treatment.
The color is "silver" and slightly yellow.

Product Features:
The nut is integrated into the washer with the outer teeth and the nut.
The outer teeth washer is digged into the surface of the teeth to prevent loosening.
All metal construction with excellent heat resistance.