Ganter: DIN6336-KT-40-M8-D Sta Knob; Plastic; Thead Boe These Star shape knobs are constructed using a Technopolymer (Polyamide PA), which gives great impact stress resistance as well as heat and cold resistance. This makes these a strong, robust and durable component. Especially suited for mechanical function components and mechanical engineering, these knobs have many more uses, from cabinet doors to wheel turning these knobs are a great addition or replacement to your old components. The recessed, star shaped head gives extra grip to enable more torque to fasten the knob in place. Features and Benefit: Impact stress resistant to avoid breakages when accidental heavy contact is made Temperature resistant -40 C to 180 C so can be used in high temperature machinery or in cold environment areas Zinc plated , blue passivated through bushing provides that added stability and also the option for more fitting applications Typical Applications: Mechanical engineering Automotive solutions