Threads
Thread size, thread pitch, UNC UNF and thread engagement charts.
Threads charts
Thread Engagement Chart: Minimum Length Table by Material (Free PDF)
Minimum engagement length by internal thread material for every metric coarse and UNC/UNF size, plus the tap drill percent engagement chart.
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Thread Pitch Chart: Metric Coarse & Fine Table (Free PDF)
Metric coarse and fine pitch for every size M1 to M64, plus TPI conversion and pitch identification.
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Thread Size Chart: Metric, Pipe & Legacy Thread Dimensions Table (Free PDF)
Every common thread series in one place: metric coarse and fine, BSP, NPT, BSW/BSF and BA dimensions plus a thread identification table.
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UNC UNF Thread Chart: Unified Thread Size Table (Free PDF)
Complete Unified inch thread tables: UNC, UNF, UNEF, 8UN/12UN and classes of fit per ASME B1.1.
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