Wide Application: The M8x40mm thread clamp knob is universally applicable for most machine tools, for example, instruments and appliances, food and industrial equipment.Size: The head diameter of this M8 star head inner thread: 32mm, the thread diameter: 8mm, the screw length: 40mm, 20 piecesHigh quality material: The star screw set is made of PP material and galvanized iron. The surface of the nut is electroplated, not only resistant to wear, corrosion and high temperature, but also not easy to rust and has a long service life.Star-shaped design: The screw with star-shaped nut can be easily fixed by hand, no need for other tools.Easy to replace: Replace the loose, broken or missing nut handle with a star handle clamp nut.A high quality star knob for broken handles. Screw type for easy installation. Plastic star head for a comfortable grip. Widely used for mechanical equipment, instruments, appliances, food and pharmaceutical industrial equipment. M8 star handle nut is made of PP material and galvanized iron, durable, high temperature resistant, corrosion resistant. Adopts star-shaped design, has strong adhesion. Colour: Black Material: environmental protection PP + galvanized iron The screw size: M8 x 40 mm the diameter of the star-shaped tightening knob: 32 mm A high quality star button for broken handles. Screw type for easy installation. Plastic star head for a comfortable grip. Widely used for mechanical equipment, instrument, appliance, food and food pharmaceutical industrial equipment. Scope of delivery: 20 x Star Grip Nuts