ISO 261 ISO general purpose metric screw threads - General plan
ISO 262 ISO general purpose metric screw threads — Selected sizes for bolts, screws, studs and nuts*, 2023-04-01 Update
ISO 273 Fasteners; Clearance holes for bolts and screws
ISO 68-1 ISO general purpose screw threads — Basic and design profiles — Part 1: Metric screw threads*, 2023-09-01 Update
ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread; Technical Corrigendum 1
ISO 898-2 Fasteners — Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes*, 2022-09-30 Update
ISO 965-2 ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose external and internal screw threads - Medium quality; Amendment 1*, 2021-06-30 Update
BS EN ISO 2320:2015 history
2016BS EN ISO 2320:2015 Fasteners. Prevailing torque steel nuts. Functional properties
2008BS EN ISO 2320:2008 Prevailing torque type steel nuts - Mechanical and performance properties
1998BS EN ISO 2320:1998 Prevailing torque type steel hexagon nuts - Mechanical and performance properties
1973BS 4929-1:1973 Specification for steel hexagon prevailing-torque type nuts. Metric series