A solid performer

Molybdenum-disulfide lubricant helps stop galling of stainless-steel tube fittings exposed to hostile environments. Half-section diagrams of a Parker Hannifin CPI singleferrule and an A-LOK two-ferrule compression tube fitting. Turning the nut drives the ferrule(s) into contact with the body seat and tubing surface. The ferrule and tubing do not rotate with the nut, but instead slide axially. This action is critical to forming a leak-free tubing connection during the first makeup and subsequent remakes. Sliding takes place at high pressure between the back of the ferrule and nut flange, and in the threads. These locations need lubricants with exceptional lubrication and anti-galling properties, such as molybdenum disulfide. Electroplated silver with wax lubricant is another option. ) is a solid that has exceptional lubricating properties under