Fowler 53-686-394-0 Master Ring 3.151-3.940
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One live offer. The cheapest is new.Product Description
Features:X ClassUsed for accurate setting of internal measuring instruments.Made from oil-hardened, non-shrinking gage steel, hardened and tempered to Rockwell 62CSubzero treated at minus 80°C for dimensional stability.Actual size etched on each master ring.Calibrated at 20°C in laboratory conditions.Furnished with a manufacturer's certificate of calibration.Metric rings available on special order.
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