Rocker Arm Nut - 7/16-20 in Thread - 0.750 in Body Diameter - 2.530 / 2.050 in Long - Steel - Big Block Chevy - Set of 16. **NOTE:
Proposition 65: These products may contain a chemical known to the state of California to cause cancer and birth defects or other reproductive harm. For more details visit https://www.p65warnings.ca.gov/