[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
"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: Dove
Hot dipped galvanized and plated with "dob" dipped into zinc dissolved It has excellent corrosion resistance at a fraction of the cost, but the thickness of the plating is quite thick and uneven and the surface is uneven, so the gauge of the thread cannot be managed. For this reason, the female thread needs to be overtapped or the same "dob" plated product. But they may stick together.
Color is "Gray".

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.