DIN6307 Tommy Nut with Movable Bar, Blackened Steel
The movable bar of these tommy nuts, DIN 6307 is held in any position by the pressure spring.
The plastic end caps limit the travel distance. They are pressed on and may be supplied separately if the parts are to be electroplated. The official DIN standard sheets provides for steel rings at this point.
Steel ST - Tensile strength class 5.8 (500 N/mm²), blackened.
Bar end caps - Plastic, grey.