A Hydraulic Oil Filter Acorn Nut is used to secure the hydraulic oil filter housing to the reservoir. It is made of steel and has a domed cap that resembles an acorn. The nut has a threaded shank that screws into the filter housing, and the cap provides a smooth, rounded surface that protects the filter from damage.Attributes: • Manufactured to precise specifications and are built for durability, and reliability• Prevent the filter from being scratched or dentedApplications:A Hydraulic Oil Filter Acorn Nut is used to provide a tight and secure seal that prevents leaks.