How to Order Specify: 1. Surface size of plate 2. Grade AA, A or B tolerance 3. Number of ledges Special Requirements Should your application require something other than a standard surface plate, we can provide you with custom options. Starrett can produce your plate from pink, black or gray granite. Custom sizes and thicknesses are available upon request to meet your needs. We can also add holes, counterbores, threaded or solid stainless steel inserts and t-slots to your surface plate. Contact Starrett Tru-Stone for assistance. Grade AA Laboratory No Ledge Two Ledge Surface Size Thickness Flatness UnilateralTolerance Weight Weight in mm in mm in mm lb kg EDP lb kg EDP 12 x 12 300 x 300 4 100 .000050 0.0012 55 25 80601 50 23 80602 12 x 18 300 x 450 85 39 80610 78 35 80611 18 x 18 450 x 450 125 57 80619 120 54 80620 18 x 24 450 x 600 6 150 .000075 0.0019 248 113 80628 224 102 80629 24 x 24 600 x 600 330 150 80646 306 139 80647 24 x 36 600 x 900 6 150 .000100 0.0025 495 225 80655 460 209 80656 30 x 48 750 x 1200 10 250 .000168 0.0043 1585 719 80883 1585 719 80884 36 x 36 900 x 900 6 150 .000150 0.0038 745 338 80701 710 322 80702 36 x 48 900 x 1200 8 200 .000200 0.0050 1320 599 80710 1250 567 80711 36 x 60 900 x 1500 10 250 .000250 0.0063 2065 937 80719 1950 885 80720 36 x 72 900 x 1800 12 300 .000300 0.0076 2970 1347 80728 2810 1275 80729 48 x 48 1200 x 1200 10 250 .000200 0.0051 2535 1150 80889 2535 1150 80890 48 x 72 1200 x 1800 12 300 .000350 0.0088 3960 1796 80755 3795 1721 80756 48 x 96 1200 x 2400 16 400 .000500 0.0127 7040 3193 80773 6750 3062 80774 Grade A Inspection No Ledge Two Ledge Surface Size Thickness Flatness UnilateralTolerance Weight Weight in mm in mm in mm lb kg EDP lb kg EDP 12 x 12 300 x 300 4 100 .000100 0.0025 55 25 80604 50 23 80605 12 x 18 300 x 450 85 39 80613 78 35 80614 18 x 18 450 x 450 125 57 80622 120 54 80623 18 x 24 450 x 600 6 150 .000150 0.0038 248 113 80631 224 102 80632 24 x 24 600 x 600 330 150 80649 306 139 80650 24 x 36 600 x 900 6 150 .000200 0.0050 495 225 80658 460 209 80659 30 x 48 750 x 1200 8 200 .000400 0.0102 1270 576 80885 1270 576 80886 36 x 36 900 x 900 6 150 .000300 0.0076 745 338 80704 710 322 80705 36 x 48 900 x 1200 8 200 .000400 0.0102 1320 599 80713 1250 567 80714 36 x 60 900 x 1500 10 250 .000500 0.0127 2065 937 80722 1950 885 80723 36 x 72 900 x 1800 .000600 0.0152 2475 1123 80731 2340 1061 80732 48 x 48 1200 x 1200 8 200 .000500 0.0130 2030 921 80891 2030 921 80892 48 x 72 1200 x 1800 10 250 .000700 0.0177 3300 1497 80758 3165 1436 80759 48 x 96 1200 x 2400 12 300 .001000 0.0254 5280 2395 80776 5060 2295 80777 Grade B Toolroom No Ledge Two Ledge Surface Size Thickness Flatness UnilateralTolerance Weight Weight in mm in mm in mm lb kg EDP lb kg EDP 12 x 12 300 x 300 4 100 .000200 0.0050 55 25 80607 50 23 80608 12 x 18 300 x 450 83 38 80616 76 34 80617 18 x 18 450 x 450 125 57 80625 118 54 80626 18 x 24 450 x 600 4 100 .000300 0.0076 165 75 80634 155 70 80635 24 x 24 600 x 600 220 100 80652 210 95 80653 24 x 36 600 x 900 6 150 .000400 0.0102 495 225 80661 460 209 80662 30 x 48 750 x 1200 .000700 0.0180 950 431 80887 950 431 80888 36 x 36 900 x 900 .000600 0.0152 745 338 80707 710 322 80708 36 x 48 900 x 1200 .000800 0.0203 990 449 80716 955 433 80717 36 x 60 900 x 1500 8 200 .001000 0.0254 1650 749 80725 1560 708 80726 36 x 72 900 x 1800 .001200 0.0304 1980 898 80734 1870 848 80735 48 x 48 1200 x 1200 6 150 .000900 0.0229 1520 689 80893 1520 689 80894 48 x 72 1200 x 1800 8 200 .001400 0.0355 2640 1198 80761 2530 1148 80762 48 x 96 1200 x 2400 10 250 .002000 0.0508 4400 1996 80779 4215 1912 80780 Other sizes available by request. No ledge and two ledge plates listed, four ledge plates available by request. 415 starrett.com G ranite S urface P roducts