Burr 1 : (1) A rough or sharp edge left on a workpiece by a cutting tool. (2) To deform the end or edge of a component by hammering, usually to help it grip another component
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}