80 x 4.8mm Phillips drive baypole screws. Baypole screws are made from 4.8mm carbon steel with a flange head and bright zinc plated. Bay windows normally consist of 3 or 5 seperate rectangular windows joined together by aluminium poles which allow them to form a bay shape. These screws are designed to screw through the plastic frame and into the aluminium bay pole and have a self drilling tip to enable this to happen.
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