NASCAR issued the No. 47 Monster Energy NASCAR Cup Series team of JTG Daugherty Racing an L1-level penalty for a lug nut infraction following Sunday's Folds of Honor QuikTrip 500 at Atlanta Motor Speedway.

The violation is laid out in section in the NASCAR Rule Book, which results in an "encumbered finish" due to lug nut(s) not being properly installed. AJ Allmendinger's car was found to have three loose lug nuts during post-race inspection at AMS.

As a result of the penalty, Allmendinger and team have been penalized 35 championship owner and driver points. Crew chief Randal Burnett was fined $65,000 and is suspended from the next three Monster Energy NASCAR Cup Series events, starting at Las Vegas Motor Speedway.

NASCAR also penalized the No. 18 Xfinity Series team of Joe Gibbs Racing for post-race violations following last Saturday's Rinnai 250. Kyle Busch's race-winning car was found to be in violation of section due to its front body inspection heights failing to meet specifications.

Crew chief Scott Graves was fined $10,000 and suspended from the next NASCAR Xfinity Series points-paying race, which takes place at Las Vegas Motor Speedway. The team was also penalized 10 owner points for the infraction. 

Under NASCAR rules, the team will not be allowed to use the victory for Playoff eligibility, and the team will not collect the playoff points for winning the race.