major diameter

ISO 724 – Basic Dimensions of Metric Threads

ISO 724 is an international standard that specifies the basic dimensions of metric threads, including: This standard provides the foundation for the ISO metric screw thread system, working alongside: Technical Details ISO 724 ensures the correct fit and compatibility of metric threads in fastening applications. It defines the primary diameters for external (bolt) and internal … Read more

ISO 68-1 – Metric Thread Profile

Metric-Thread-Profile

ISO 68-1 is the international standard that defines the fundamental profile and geometry of metric screw threads. Metric threads are widely used in mechanical and industrial applications due to their standardization and compatibility across industries. This standard establishes the triangular thread form with a 60° thread angle, specifying crest and root rounding for optimal performance. … Read more