Features Spring Loaded Ball Plugs: With the help of a spring with a certain pressure to push the ball movement, so that the equipment runs smoothly. Positioning ball is also called ball head plunger or spring plunger. A load device (SLDs) consisting of a shell, spring, ball or cylinder. Widely used in some medical equipment, lubrication equipment, pneumatic tools and other products. Spring loaded ball plunger screws are often used by engineers in molds, fixtures, assemblies, and other jobs. With the help of a certain pressure of the spring to promote the movement of the ball, so that the smooth operation of the equipment. Features:Made of stainless steel material, which can provides strength and offers good corrosion resistance in many circumstances.Positioning ball is also called ball head plunger or spring plunger. A load device (SLDs) consisting of a shell, spring, ball or cylinder.Widely used in some medical equipment, lubrication equipment, pneumatic tools and other products.Engineers often use it in mold, fixture, assembly and other work.With the help of a certain pressure of the spring to promote the movement of the ball, so that the smooth operation of the equipment. Specification:Material: stainless steelSize:M6*8/10/12/16/20/25(Optional)Weight: Approx.20g~54g/0.7oz~1.9ozQuantity: 20 PCS Package list:20 x Spring Ball Plunger Screw Package List