| GENERAL CHARACTERISTICS ITEM DESCRIPTION | FORMS A PERPENDICULAR, FLAT AND PARALLEL REFERENCE FOR WORK DONE ON THE SURFACE OF A PLATE, SIX FACES ARE FINISHED TO PRODUCTION - GRADE ACCURACY .000100 IN. OR MASTER - GRADE .000050 IN. ACCURACY PER 6 IN., TEN 1/4-20 STAINLESS STEEL INSERTS ARE EMBEDDED INTO THE FOR CLAMPING PURPOSE |