Manufacturer: Nitto Seiki Co.Ltd.
Model: Cup Bolt

Features

Special head (for M8 to 16): The integrated design of the screw, spring washer, and flat washer reduces both weight and cost. The cup-shaped flange firmly contacts the surface around its circumference, delivering a strong anti-loosening effect.
Replaces bolts with built-in washers, resulting in “lightweight” and “cost reduction”.
Cup shape provides anti-loosening effect equal to or greater than that of spring washers + flat washers.

Main applications

Points where you want to reduce costs from fastening using washers.
Users apply high tightening force at points where they are concerned about loosening.
Automobiles, copiers, office equipment, etc.