Show HN: I read ISO 273 off the standard because the online charts disagree

Category: other

Tags: iso-273, clearance-holes, mechanical-engineering, fasteners, reference

Score: 4.0/10 (Innovation: 4, Technical: 3, Documentation: 7, Utility: 5)

A meticulously sourced ISO 273 clearance hole chart covering M1 to M150, derived directly from the standard rather than copied from unreliable online charts. It includes practical guidance on series selection (fine/medium/coarse) and highlights the common errors in other charts. The page also introduces Supra, an AI CAD tool that automates fastener fit checks against ISO 273.

Target audience: mechanical engineers, CAD designers, manufacturing engineers

Repository: https://supra.silviaai.dev/reference/iso-273-clearance-holes

View on Hacker News