Bülte washer faced wing nuts are available in M6 with a washer of 2 mm thick and a diameter of 21 mm. The integral washer removes the need for a separate washer and reduces assembly time. They are standard made of polyamide 6.6, which is rust-free, insulating and extremely light. These wing nuts have an excellent resistance to traction and heat and good electrical and chemical resisting characteristics. They can be used in a working temperature range from -30 to + 100°C. Alternative materials are available on request, such as Polyethylene and Polypropylene recommended for their good food and medical qualities.