BS EN ISO 225:2010
Fasteners. Bolts, screws, studs and nuts. Symbols and descriptions of dimensions
This International Standard defines the symbols and gives descriptions of the dimensions of bolts, crews, studs and nuts for use in the appropriate product standards and drawings.
This document is issued in the three official ISO languages - English, French and Russian, and is also available in Chinese, German, Italian, Japanese, Spanish and Swedish.
This third edition cancels and replaces the second edition (ISO 225:1983), which has been technically revised.