Boss Part # HYD07036 - Gland Packing Kit for HYD07034 Cylinder. If you are noticing leaks coming from your gland nut, there's a good chance you have a bad seal within the nut itself. This can happen even if there is a small cut or tear in the gland nut seal. Rather than replace the entire hydraulic cylinder, replace the gland nut itself to resolve your problem for a fraction of the price. This is the gland nut used to repair cylinders such as HYD07034 and others.