"NASCAR has been closely monitoring the aggressive strategies on pit road. Safety is an area we do not take lightly, as our record has clearly indicated. It's important for us to have a system in place immediately for addressing lug nut installation, while we also work alongside the industry to develop the best long-term solution."

Possible Penalties:

Sprint Cup Series: If found pre-race, it counts as an unapproved adjustment and the team will have to start at the tail of the field and must make a correction immediately.

Tires intended for race use without all five lug nuts glued to the wheel results in a written warning and must be corrected immediately.  If found post-race, the first offense is a minimum of $20,000 fine and crew chief suspension for one race and probation. Multiple offenses will result in escalated penalties.

XFINITY Series: Post-race (P3 penalty) First offense: minimum of $10,000 fine, crew chief suspension for one race and probation.

Camping World Truck Series: Post-race (P3 penalty) First offense: minimum of $5,000 fine, crew chief suspension for one race and probation.

Memo Obtained Courtesy of NASCAR