ABSTRACT
Thread lubricants provide control of the thread friction level and prevent metallurgical bonding during the assembly of a fastener. Lubricants affect both the nominal level and the variability of the resultant tension that is developed in a fastener when it is assembled to a target torque level. A lubricant that is properly selected will prevent galling, fretting, and seizing and reduce friction and wear of the fastener compared to a dry-assembled fastener. Thread lubricants can also provide antiseize function during disassembly or removal of the fastener. The lubricant can protect the fastener from moisture or chemical exposure. Corrosion can be reduced and in some cases prevented during storage and shipping and in service through the use of lubricants. Thread lubricants have a significant effect on the torque-tension relationship of a fastener.
