Description
Surface reference standard, 4340 Steel, with EDM notch depths of 0.008″, 0.020″ and 0.040″ inches +/-.001 (0.2mm, 0.51mm and 1.02mm), Notch Width: .005″ +/-.002″ Wide EDM notches, .007″ Wide MAX. Reference standard overall dImensions 1 X 4 X 0.25 inc…