Thread Reference Tools
Practical tools for engineers, machinists, and makers. All data generated from industry standards.
Drill & Tap Chart
Recommended tap drill sizes for metric, UNC, and NPT threads. Find the perfect drill bit for any thread.
Torque Specifications
Recommended tightening torque for metric bolts in grades 8.8, 10.9, and 12.9. Both dry and lubricated values.
Bolt Grade Chart
Complete mechanical properties for ISO 898-1 and SAE J429 bolt grades. Tensile, yield, proof stress, and hardness.
Thread Cross Reference
Find equivalent thread sizes across different standards. Compare metric, UNC, UNF, and pipe thread dimensions.
All tools are 100% client-side. No data is sent to any server.
Calculations are performed in your browser. Data is generated from ISO, ASME, and SAE standards.