R71318.5

Step drill with 90° included step angle, DIN 6535HA parallel shank and a drilling-pilot diameter of 8.50mm with a length of 25.50mm, a countersink diameter of maximum 12.00mm and an overall length of 102mm, according to DORMER standard to produce a thread tapping drill hole with chamfer for M10 thread, solid carbide and bright finish for machining free machining, plain carbon, alloy and tool steel, ferritic, martensitic, austenitic and super-austenitic, Duplex or precipitation hardening stainless steel, grey, malleable, ductile, austenitic or austempered ductile and compacted graphite cast-iron, wrought and cast aluminium and copper or copper alloys