Home / Lots More! / Sign Fittings / Flap Hinges (For A-Boards) Flap Hinges (For A-Boards) £16.07 £13.39 (ex. VAT) Flap Hinges (For A-Boards) Add to your Wish List Information Stainless steel flap hinge for A-Boards. 50mm Long (sold in singles)