[M8]
■ Shape: Flanged Hex Nut
Hex nut on one side with a seat larger than two sides
The seat surface has a large amount of tightening strength and prevents loosening.
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 (S45C)
It is a high carbon steel called carbon steel for mechanical structures. It contains more carbon than iron, has better quenching properties and is stronger than iron.
■Surface treatment: Trivalent white
It has the same corrosion resistance as "chromate" and has the same possibility of imitation self-healing.
Unlike hexavalent chrome, it is non-toxic and compliant with RoHS directive. So it is used as an alternative to unichromate/chromate.
Color is "Silver Color".