Surface Plate, 4 in Thick, A Grade, Starrett, Mfr#: 88631

Item Surface Plate, Long Form Calibration Certificate No, Material Granite, Application Grade Inspection, Color Red, Edge Style Flat, Flatness 0.000150 in/0.0038 mm, Grade A, Length 24 in, Surface Size 18 in x 24 in; 450 mm x 600 mm, Thickness 4 in, Standards ASME B89.3.7 2013, U.S. Federal Specification GGG-P-463c, Surface Size (In.) 18 in x 24 in, Surface Size (mm) 450 mm x 600 mm, 18 in