Fractional Inches to Millimetres: Workshop Conversion Chart
Exact fraction-to-decimal inch and millimetre conversions in 1/64-inch steps, with a thou table and a two-page printable A4 workshop sheet.
Read the guideWorkshop guides
Practical reference for choosing and using workshop supplies. Check the specification for your particular job.
4 guides
Whitworth, BSF and AF Spanner Size Chart
Selected Whitworth and paired BS tool markings with across-flats dimensions in inches and millimetres. Includes a one-page printable A4 workshop reference.
Read the guideTapping Drill Size Chart: Metric and Imperial
Selected cutting-tap pre-drill sizes for metric coarse, UNC and UNF threads, with an approximate 75% theoretical-thread basis and a three-page printable A4 reference.
Read the guideImperial Thread Size Chart: BSW, BSF, UNC and UNF
A workshop lookup chart for selected fractional bolt sizes, nominal metric diameters and BSW, BSF, UNC and UNF pitches, with a printable A4 PDF.
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