10Pcs M12 Stainless Steel Thread Hex Socket Spring Ball Plunger Screw (M12*25)

1、100% brand new and high quality. 2、Made of stainless steel material durable to use. 3、This screw is a?load device consisting of a housing a spring a ball and a cylinder. 4、Push the ball with a spring with a certain pressure to make the device run smoothly. 5、Widely used in some medical equipment lubrication equipment pneumatic tools and other products.