BLACK AND DECKER ABRASIVE WHEEL 50644 NEW ABRASIVE BOND GRADE DESIGNATION ANY ACCEPTABLE ABRASIVE GRAIN STRUCTURE DESIGNATOR 7 ABRASIVE MATERIAL ALUMINUM OXIDE ANGLE IN DEG 15.0 BINDER MATERIAL ANY ACCEPTABLE EDGE WIDTH 0.687 INCHES NOMINAL END ITEM IDENTIFICATION USAGE DESIGN: VALVE SEAT STONE HOLE DIAMETER 0.562 INCHES NOMINAL MOUNTING METHOD THREAD INSERT OUTSIDE FLAT DIAMETER 1.125 INCHES NOMINAL OVERALL THICKNESS 0.750 INCHES NOMINAL SCREEN GRIT SIZE DESIGNATOR 80 THREAD DIRECTION RIGHT-HAND THREAD SIZE AND SERIES/TYPE DESIGNATOR 0.562-16 UNM WHEEL DIAMETER 1.625 INCHES NOMINAL WHEEL STYLE 52 SPECIAL "TS" NEW 006039006 E-130 #34