Steering rod sealer & Lubricator. Allows sticky hard-to-move steering rods to be properly & easily lubricated for smooth easy steering action. System includes: SS lubricating nut with -oil seal & Grease (zerk) fitting. Keeps moisture & contaminants out enables several types of lubricants to be poured or pumped in. Helps correct & prevent steering problems. For both Mechanical & Hydraulic systems. Fits all Major U.S. & foreign motors. 7/8''x14 pitch threads. Easy installation. Marine-grade SS for salt & freshwater use.