Thimble 5 : A metal ring formed with a groved outer edge so that it fits within an eye splice to maintain its shape and to protect the rope from chafing
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}