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Our range of BSF hexagon re-threading die nuts is designed for cleaning and restoring damaged external British Standard Fine (BSF) threads. These hexagonal die nuts are primarily used for thread repair and maintenance applications rather than cutting new threads.
BSF threads are commonly found in classic machinery, vintage automotive and restoration work. The hexagonal form allows easy use with standard spanners or sockets for controlled thread restoration and maintenance.
Browse the selection below and refine by BSF thread size to find the correct hexagon re-threading die nut for your application.