Loading... Please wait...M.9 & 90UNM Bottoming Tap; to DIN standards Shank 1.5mm made from hardened high speed steel. Our bottoming taps are designed creat the cut the material to create the thread form in blind holes. Well suited for materials like aluminum, copper, brass stainless steel in the 300 series, pricing base on order to 24 pieces. Image is representative and not exact item. This is a production tap for use on automatic screw machines and other similar application.