NASCAR has fined four Cup crew chiefs $10,000 each for an unsecure lug nut on their cars following Monday’s STP 500 at Martinsville Speedway.
It fined Chad Johnston, crew chief for Kyle Larson; Justin Alexander, crew chief for Austin Dillon; Derrick Finley, crew chief for Michael McDowell and Jeremy Bullins, crew chief for Ryan Blaney.
No other penalties were issued.