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Material Description.

This coating is a fluoropolymer-based coating specially applied to the threads and other locations on a fastener (mostly on threads of nuts and studs). The coating prevents electrodeposited primers (E-coat) from adhering to the protected areas.

Symbols. Not applicable.

Applicability.

Weld studs and nuts; clinch (pierce) nuts and studs; tapping plates.

Remarks.

This specification covers the basic requirements for a fastener coating to prevent buildup of Ecoat. Use of this finish on threaded surfaces and/or bearing surfaces of joints could affect the torque-tension relationship. It is recommended that a torque-tension study of the fastener joint be performed before releasing this finish on a new application.