Fasteners & Torque calculators & charts
Bolt torque, counterbores, countersinks, bolt circles, keyways, Woodruff keys, retaining-ring grooves, dowel pins and ER collets. The torque chart uses the short-form relation T = K × D × F with the nut factor K set by the lubrication condition, because thread and head friction absorb most of the applied torque and decide the clamp load you really get. The key and countersink charts list dimensions from ANSI B17.1, ANSI B17.2 and ASME B18.6.3.
All 11 Fasteners & Torque tools
ANSI B17.1 Keyway Dimensions Chart & Shaft Depth Calculator (h_c)Complete ANSI B17.1 inch and DIN 6885 metric keyway dimensions chart and calculator.Open ANSI B17.2 Woodruff Key & Keyseat Dimensions Calculator (+ DIN 6888)Decode ANSI B17.2 Woodruff key numbers, and calculate shaft keyseat depth B, arc crown allowance, milling cutter plunge depth, and DIN 6888 specs.Open ASME B18.6.3 Flat Head Screw Countersink Chart & Z-Plunge CalculatorComplete ASME B18.6.3 82° and aerospace 100° flat head screw dimensions chart and CNC countersink Z-plunge depth calculator from surface or pilot hole lip.Open CNC Countersink Depth CalculatorCalculate exact CNC countersink and chamfer mill Z-axis plunge depth for 60°, 82°, 90°, 100°, 118°, and 120° tools with non-zero tool tip flat compensation.Open Countersink Angle & Diameter ChartCountersink angle and diameter chart. 82° ASME vs 90° ISO vs 100° aerospace vs 120° deburr angles, depth formulas, and flush seating specs for flat head screws.Open Dowel Pin Reamer Chart & Tolerance CalculatorComplete ASME B18.8.2 and ISO 8734 dowel pin press-fit and slip-fit reamer hole tolerance chart, with interactive interference and clearance calculator.Open ER Collet Clamping Range & Nut Torque ChartMaster DIN 6499 / ISO 15488 ER collet chart.Open Machinist Bolt Circle CalculatorInteractive machinist bolt circle calculator.Open Master Bolt Torque ChartMaster bolt torque chart for SAE Grade 2/5/8 and Metric Class 8.8/10.9/12.9 fasteners.Open Retaining Ring Groove Dimensions ChartInteractive internal and external retaining ring groove dimensions chart and thrust load calculator for DIN 471, DIN 472, and ANSI B27.7.Open Socket Head Cap Screw Counterbore ChartComplete socket head cap screw counterbore chart and calculator for ASME B18.3 inch and ISO 4762 metric fasteners with washer depths.Open
Other drawers
Every result on these pages comes with its formula and the standard behind it. How the numbers are computed and checked is described in the calculation methodology.