What the heck am I talking about? Guess what I learned. during my antique truck restoration, thanks to our good friend Marty at X-Stamper. Bolts must be torqued and then appropriately marked on the head, to indicate completion. This ensures on assembly lines that guys don’t over- or under- torque bolts on essential hardware, such as seatbelts, which I replaced in this brief video. Let me know in the comments if I did it right?? Thanks for watching!! ~TMG