These bolts are torque to yeild, TTY, and are not re-usable. Quantity 4 required. 

BC3Z-6379-C OE Crankshaft Pulley Balancer, Automatic Transmission Flexplate, M12 Bolt

For 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 Ford 6.7L Powerstroke