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Holds a great deal of useful information for Engineers, Draughtsmen, Toolmakers, Model Engineers and Designers. Made to a very high quality from a white plastic with printed letters. Converts mm. to in. Fractions in. to mm. Standard Wire Gauge.Thread diameters. Drill sizes in. & mm.Threads per in. Metric pitches. Clearing drill sizes.Tapping drill sizes. BSF,BSW, BA, BSP(GAS), ISO Metric Fine, ISO Metric coarse, UNF No.0 to 1, UNC No.1 to 1. NB This is NOT a heating calculator. Pocket size. Dia. 4 1/8in. 105mm. Display pack.
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