Hall-Fast’s range of Peek Fasteners. PEEK had the ability to retain its shape with temperatures as high as 180°C and offers resistance against most chemicals. PEEK is perfect to suit demanding environments such as chemical tanks, electrical transformers or heat-producing appliances, or in industries were chemicals are expected to be involved. If PEEK isn't the material you need for your fastener needs, be sure to look through Hall-Fast’s range of other plastic fixings.