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Our data and zeus charts are a must have for any engineer in the workshop. These amazing charts contain data on standard drill sizes and decimal equivalents, tapping drills and clearances for metric and imperial threads, BS4500 tolerances, hardness comparisons, jig boring co-ordinates for equally spaced holes, allowances for sheet metal bending and Morse tapers, created by members of the British Standards Institution so you can be sure the data is accurate.

Data and Zeus Charts

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