Standard DIN undercuts typically use blend angles of 30 or 60 degrees . Add a thread undercut - PTC Support Portal
The standard categorizes undercuts into four primary forms based on whether they are for external or internal use and their required length: Application Description External Threads The normal (standard) case for shafts and bolts. Form B External Threads din 76-a pdf
Thread Relief Explained: Function, DIN 76 & Practical Use - BAER Tools Standard DIN undercuts typically use blend angles of