M6 and M8 female thread knurled knob are made of high quality plastic, with good toughness and strong anti-aging ability and long service life. The star-shaped design is used to increase the sense of use when rotating. The surface of internal M6 and M8 threaded knob is polished, so it won’t hurt your hands even if you rotate it for a long time. Female thread diameter: M8 and M6, head diameter: 32mm and 25mm. There are 10 pieces M6 and 10 pieces M8 Star Head Handle Thread in the package, two sizes, which can meet your different needs. Female thread knurled knob are widely used in machine tools, mechanical equipment, instrumentation, food and pharmaceutical industry equipment.