Size - Thread Size: M10x1; Thread Length: 17mm / 0.67 inches, pin diameter: 5mm / 0.2 inches. Small and for easy carry with you. Material - The return knob plunger is made of carbon steel, which has high hardness and resistance. The is blackened to prevent rust and is . Advantages- The thin thread of the spring plunger is conducive to fine-tuning the plunger installation position to achieve the optimal working position for designers and achieve precise indexing and positioning. Application - Telescopic lock pin is an indispensable accessory in the machinery industry and is widely used in industrial equipment, engineering machinery, and workshop machine tool production equipment. Instructions - By operating the knob to pull out or insert the pin, you can easily and quickly locate and fix the mechanical elements of the workpiece. The Spring Plunger is an important part or component of the machine. Used to enhance the interlocking function of workshop machinery or adjust fitness equipment.Widely used in engineering machinery and equipment, trucks, film and television industry equipment, workshop machine tool production equipment, and other industrial fastener automatic equipment. Colour:Black Material:Carbon Steel Package Contents: 3 x Return Knob Plunger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.