Description
12 HOLE REFERENCE STANDARD . HOLE SIZES: 1/8″, 5/32″, 3/16″, 7/32″ 1/4″ , 5/16″, 3/8″, 7/16″, 1/2″, 9/16″ 5/8″, 3/4″ .020″ x .005″ +/- .002″ WIDE MID-WALL EDM NOTCH. Material: 4340 Steel. Includes Test Report and Certificate of Conformance.