1. Fasten the connector, used to fix the hose and the joint so that the gas or liquid can be safely transmitted without leaking. 2. 360-degree clamping, resistance to thermal expansion and contraction, the surface is treated with color zinc plating, which is not easy to rust and has a long service life. 3. With spring double ring structure, it has better fastening effect. 4. Scope of application: widely used in motor vehicles, machine tools, trains, ships, aviation, petroleum, chemical, pharmaceutical, mining, sewage treatment, purification projects and gas pipelines. 5. Parameters: Material: Iron Surface treatment: color zinc plating specification: Diameter range: 12mm, screw diameter: 5mm, screw length: 31mm, wire diameter: 1.5mm Diameter range: 16mm, screw diameter: 5mm, screw length: 31mm, wire diameter: 1.5mm Diameter range: 19mm, screw diameter: 5mm, screw length: 31mm, wire diameter: 1.5mm Diameter range: 22mm, screw diameter: 5mm, screw length: 37mm, wire diameter: 2mm Diameter range: 29mm, screw diameter: 6mm, screw length: 37mm, wire diameter: 2mm Diameter range: 32mm, screw diameter: 6mm, screw length: 37mm, wire diameter: 2mm 6. Packing: M12 x 12 M16 x 10 M19 x 10 M22 x 8 M29 x 4 M32 x 4