DIN 551 standard special ball-tipped set screw that clamps and applies spring-loaded pressure without damaging surfaces, thanks to the ball at its tip.
DIN 551 Ball Point Set Screw (Spring-Loaded Pressure Screw) is an essential fastening and positioning element for precision mechanics. The ball-tipped end inside the body prevents scratching the opposing surface during clamping, and allows parts to lock or slide along a spring-loaded axis.