Specification Brand : HARFINGTON BulletPoint1 : Size - M12*1.75 thread size, thread length: 13mm / 0.51 inches, pin diameter: 8mm / 0.31 inches. Small and lightweight for easy carry with you. BulletPoint2 : Material - The spring pin is made of stainless steel, which is rust-proof, corrosion-resistant, heat-resistant, and durable. BulletPoint3 : Feature - Features a round head design with a pull ring that can rotate 360 degrees for easy manual expansion and contraction. BulletPoint4 : Application - A telescopic lock pin is an indispensable accessory in the machinery industry, which can prevent inaccurate positioning and errors in pinhole matching. It is widely used in chassis, cabinets, electrical appliances, automotive, or the positioning and limit structure design of precision instruments such as jigs and fixtures. BulletPoint5 : 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. ItemName : HARFINGTON 2Pcs Spring Plunger with Pull Ring M12x1.75 Thread Size 0.51" Thread Length Pin Dia.8mm Round Head Stainless Steel Non-Locking Retractable Index Plunger for Industrial Equipment ItemPackageDimensions_Height : 0.79 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 1 ItemTypeKeyword : ball-nose-spring-plunger Manufacturer : HARFINGTON Material : Stainless Steel NumberOfPieces : 2 PartNumber : hta240129hh000869 PinType : Spring ProductDescription : The spring pin is made of stainless steel, which has high hardness, corrosion resistance, rust resistance, and durability. The spring plunger with pull ring adopts a round head design and has a pull ring that can be rotated for manual expansion and contraction. And equipped with nuts to lock in various mechanical equipment. It is an important part or component of the machine. It is used for locking and fixing the base of the optical axis fixture and is practical and convenient. widely used in precision structural positioning and limit design in non-standard automation industries and tooling fixtures. It is also used in cabinets, electrical appliances, and cars.