Product details : DORMER E5311/4NO6 TAP 1/4 INCH X 20 5977260
HSS Machine thread-cutter for BSW thread uncoated ISO 529 shape C straight grooves 1.5xD blind and continual holes for general use in steel <1200 N/mm². Cast iron. Copper and brass. Aluminium alloys. Duraplastics and fibre-reinforced plastics.