Profile: Keystone Industries manufacturers a complete line of hot melt replacement parts for Nordson®, Slautterback® and ITW®. We also restore hot melt systems, applicator heads and pumps. We carry a complete line of glue stick guns, glue sticks and bulk hot melt adhesive. Our product line includes glue tips, nozzles, modules, heated hoses, tank filters, inline filter assemblies, inline filters, fittings and seal kits.