screw thread insert hand tap Material:Extra HSS Suitable for tapping blind & Through holes in aluminum,aluminum alloy casting and zinc alloy casting. materials:HSS Surface threatment:brightSuitable for hole condition:blind & Through holesThread symbol:MChamfer length:1.5P 5PPitch dimeter limits:JIS 1bWecan supply any specificationof taps and any typesas you need.If you have any need please contact us at you feel free.