Lubricant to be used on the nuts with the washers. Bolt lubrication greatly affects the torque values used when installing gaskets. To achieve the same gasket compression, a much higher torque value is required for a dry bolt versus using an effective lubricant such as molybdenum disulfide. In a dry bolt up, or where an inefficient lubricant is used, the effort used in tightening is overcome by the frictional forces between the bolts and nuts and to a greater extent; between the nuts and nut facing. This can result in a lower gasket load and in-adequate stress on the bolts, which can result in torque loss and eventual leakage in service.



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