Tuf-Lok™ International designs and manufactures pipe couplings and other products for industrial applications. Tuf-Lok™ International is located in Madison, Wisconsin, USA. This office provides sales, engineering, techn......Tuf-Lok™ International designs and manufactures pipe couplings and other products for industrial applications. Tuf-Lok™ International is located in Madison, Wisconsin, USA. This office provides sales, engineering, technical and service support to customers and representatives worldwide. Industries Served Mining Steel Foundry Chemical/Rubber Glassfire Protection HVAC Water Wastewater Oilfield Food/Beverage Dairy Pharmaceutical Power Ceramic Material Handling Maritime Industrial Piping Plastics Aluminum Automotive Pulp and Paper