Description
12 Hole reference standard. Material: 4340 Steel. Contains 12 hole sizes; 3/16 inch (4.74mm) 7/32 inch (5.53mm) 1/4 inch (6.35mm) 9/32 inch (7.13mm) 5/16 inch (7.92mm) 11/32 inch (8.71mm) 3/8 inch (9.52mm) 7/16 inch (11.09mm) 1/2 inch (12.7mm) 9/16 inch (14.27mm) 5/8 inch (15.87mm) 3/4 inch (19.05mm); Each hole contains 0.030″ x 0.030″ (+/-.002″) corner EDM Notch. Includes Test Report and Certificate of Conformance.