Open links in new tab
  1. Metric screw thread: M Profile calculator - Theoretical Machinist

    Jun 25, 2025 · M Profile: (ISO Metric Screw Thread form) A standard that describes the shape of an internal or external thread using metric millimeter dimensions. Making a thread that follow these …

  2. TR knowledge base | Tapping sizes and clearance holes

    Tapping sizes and clearance holes for metric and unified threads.

  3. Tap drill size calculators - Theoretical Machinist

    Dec 19, 2019 · Tap drill size calculators for unified national imperal and metric threads

  4. TR knowledge base | Thread conversion table

    Table showing nearest thread equivalents - Metric, Metric Fine, BSW, UNC, UNF.

  5. TR knowledge base | Thread geometry - metric coarse

    Thread geometry for coarse metric threads. All dimensions in mm unless otherwise stated. Tolerances: Male thread 6g, female thread: 6H.

  6. Steel fasteners - pre-load and tightening torques - coarse metric threads

    Steel fasteners - Pre-load and tightening torques - coarse metric threads.

  7. TR engineering knowledge base | Guides, specifications and glossaries …

    Coatings Thread geometries Metric screws Pre load and tightening torques coarse metric threads » Pre load and tightening torques fine metric threads » Stainless steel pre load and tightening torques …

  8. Stainless steel fasteners - pre-load and tightening torques - coarse ...

    Pre-load and tightening torques for stainless steel fasteners - coarse metric threads.

  9. Tap Drill Size by percentages chart - Theoretical Machinist

    Feb 20, 2015 · Quick imperial and metric tap drill size chart using thread percentages

  10. TR knowledge base | Thread geometry - Self Tapping Screws

    Thread geometry for metric and inch self tapping screws.