기능

• It has a strength equivalent to 8.8.
• Use when strength is required.
• Since the head is small, it can be reduced in weight and size.
• The screw pitch is finer than the standard one.
• As with flange nuts, the area of the seat surface is large, so it is effective to prevent the seat surface from caving in the material.
• It is used when you want to improve the appearance or when work efficiency is required because it eliminates the work of installing washers.
• Since it is fine, it is hard to loosen, and it is used for female screws of the same pitch.