The European product specification BS EN74-1:2005 Couplers, spigot pins and baseplates for use in
falsework and scaffolds, recognises the essential safety requirements for scaffolders, safety officers and
other site personnel to be able to visually identify EN74 scaffold fittings, by placing a requirement on the
coupler manufacturer to mark each EN74 scaffold fitting with a series of identification letters and numbers,
clearly and durably.