Description
Step drill with 180° included step angle, straight shank and a drilling-pilot diameter of 4.50mm with a length of 11.00mm, a large diameter of 8.00mm and an overall length of 79mm, according to DORMER standard to produce a medium fit through hole and flat bottom seat for M4 socket-head cap screws, HSS and steam tempered finish for machining free machining, plain carbon and alloy steel, ferritic and martensitic stainless steel and grey cast-iron
