[M18]

■Shape: Hex nut (with friction ring)
Hex nut for loosening and a spring-action friction ring on the top creates friction on the screw such as bolts to prevent 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, hardened)
It is a high carbon steel called carbon steel for mechanical structures. This steel material is "hardened (heating and cooling) to increase its hardness, and it improves mechanical properties such as tensile strength and strength over normal S45C.

■Surface treatment: Chromate
Chromate-treated for corrosion resistance
Chromate coating is more corrosion resistant than unichrome It contains harmful hexavalent chromium and does not comply with RoHS directive. The alternative is trivalent white.
Shades are "Tan".

Product Features:
Shape
A ring that has a spring effect on the nut (the material called friction ring is SUS301) is integrated into it.

Features
The spring action of the friction ring creates friction on the male thread, creating a loosening effect.
Prevents premature fall off even if the shaft strength is reduced.
Can be fixed in an intermediate position.
All metal construction with excellent heat resistance.
The shape will vary by 1 or 2 types depending on the dimensions.
No special tools required for fastening.
Comes with a manufacturers own engraving.

Precautions for Use:
Please use the bevel tip with the screw accuracy of JIS6g (grade 2) on the other bolt.
Please make sure that the screw is at least 2 pitches from the friction ring for full functionality.
Cannot be screwed on the friction ring side.