Keep your machinery perfectly lubricated and protect moving components from premature wear with our selection of grease nipples for agricultural and industrial equipment. Also known as grease fittings or Zerk valves, these small yet essential mechanical components are engineered to allow smooth introduction of lubricating grease into bearings, spherical joints, PTO shafts, lift arm pins, and top link assemblies. Manufactured from high-strength galvanized steel or brass, they feature an internal ball check and spring mechanism that prevents grease from escaping while blocking dust, dirt, and external contaminants during open-field operations. We supply a comprehensive assortment including straight, 45-degree, and 90-degree grease fittings, featuring both metric and imperial threads, designed to facilitate routine maintenance on your machinery fleet even in the hardest-to-reach locations.