Made of 304 Stainless Steel. Easy to install, detachable, and reusable: Compared with other connection methods, the threaded structure of the mother and child is easy to disassemble and reuse, and easy to maintain. Standard hexagonal groove type, evenly distributed force, better fastening effect. Feature: Standard hexagonal groove type, evenly distributed force, better fastening effect. Steel NACX 5/16(8mm) , Male M6 X 20mm Binding Bolts Fastener, 304 Stainless Steel, 15Sets Screw Post The workmanship is high-quality, firm and durable. Application: It can effectively prevent components from becoming loose or falling off due to factors such as vibration and friction. Corrosion and rust resistance, oxidation resistance and heat resistance, high strength and toughness. Male Thread Diameter: 6mm/ 0.23'', Male Thread Length: 20mm/ 0.78'', Female Thread Diameter: 8mm/ 0.31'', Female Thread Length: 20mm/ 0.78''. Made of 304 Stainless Steel. Corrosion and rust resistance, oxidation resistance and heat resistance, high strength and toughness This structure can generate high connection forces, ensuring solid connections between connecting components. Male Thread Diameter: 6mm/ 0.23''. Widely used in mechanical equipment, automobiles, electronic products, luggage, leather goods, clothing, furniture, ventilation, decoration, woodworking. Female Thread Diameter: 8mm/ 0.31''.