Davis No. 425 Lube II Lube II allows sticky, hard to move steering rods to be properly and easily lubricated for smooth, easy steering action.The system includes a stainless steel lubricating nut with an oil seal and a grease (zerk) fitting. This lubricator's unique design keeps moisture and contaminants out while enabling you to pour or pump several types of lubricant in. Works for both mechanical and hydraulic systems. Fits all major US and foreign motors (7/8" x 14 pitch threads). Easy installation. Marine grade stainless steel nut for salt and fresh water use.