A-CL80H-AI 80 Hvy Connector Link (USA)One New Aftermarket Replacement #80H Heavy Connector Link for Agricultural and Industrial Equipment This #80H heavy duty connector link (also called a master link) is used to join two ends of ANSI #80H heavy roller chain together. It is manufactured to ANSI standards and is USA made, making it a reliable replacement for worn or damaged connecting links on drive chains found throughout agricultural, construction, and industrial equipment.