Product Details: The Lincoln Industrial Short Grease Fitting with Ball Check is designed to provide a wide-angularity of contact and tight metal-to-metal seal. Constructed using high-quality materials for durability, this fitting also features a ball check to help prevent dirt and grit from getting to the bearing. This fitting is ideal for a variety of industrial applications and is sure to provide reliable performance. FleetPride is your First Click in Heavy Duty®.