Mission
ThreadSizeGuide helps makers, machinists, technicians, maintenance teams and engineers reach a useful answer quickly while preserving the source, assumptions and limitations behind it.
What makes the reference different
The data model distinguishes standard identities, manufacturer recommendations, calculated references and practical guidance. The calculation engine is independent of the website and tested with exact conversion cases.
Current scope
The current release includes 57 straight-thread records, an explicit NPT source comparison, documented clearance-hole recommendations and four core tools. Coverage expands only through documented source review.