Steel gauge block Tolerance class 1
Of special alloy steel, carefully hardened and stress-relieved.
Size 0.5 to 10 − cross-section = 30×9 mm.
Size 11 to 500 − cross-section = 35×9 mm.
Tolerance class 1 for checking standards, gauges and for setting length gauges as well as for normal inspection work in the inspection room.
Version same as No. 480450.