Normas ISO

ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data — Amendment 1

ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data

ISO general purpose metric screw threads -- Tolerances-- Part 2: Limits of sizes for general purpose external and internal screw threads -- Medium quality

ISO 965-2:1998/Amd 1:2021

ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for internal and external threads (tolerance classes 6H and 6g for M1,6 to M100 and 5H and 6h for M1 to M1,4)

Masonry-- Part 2: Unreinforced masonry design by simple rules