UNF – Unified National Fine Thread

The Unified National Fine (UNF) thread is part of the Unified Thread Standard (UTS) and features a finer pitch compared to Unified National Coarse (UNC) threads. The increased number of threads per inch (TPI) results in a stronger, tighter fit, making UNF threads ideal for applications requiring high-strength fastenings, vibration resistance, and precise engagement. Key … Read more

UNC – Unified National Coarse Thread

UNC (Unified National Coarse) threads are part of the Unified Thread Standard (UTS), primarily used in inch-based fastening systems. These threads have a coarse pitch, making them stronger, more durable, and resistant to wear compared to fine threads. UNC threads are commonly used in: This standard is closely related to: Technical Details UNC threads are … Read more

ISO 1502 – Thread Gauges for Metric Threads

ISO 1502 is an international standard that defines gauging methods for inspecting metric screw threads. It specifies the use of GO and NO-GO thread gauges to verify whether a thread meets the required tolerances according to ISO 965. This standard is critical for quality control in manufacturing to ensure that internal (nut) and external (bolt) … Read more

ISO 965 – Metric Thread Tolerances

Metric Threads

ISO 965 is the international standard that defines tolerances and deviations for metric screw threads. It ensures that internal (nut) and external (bolt) threads fit together correctly within specified limits. This standard is essential in engineering, manufacturing, and quality control, as it ensures threaded components function properly without excessive looseness or tightness. ISO 965 is … Read more

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