Thread the nut onto the bolt, hit it with 37 “ugga-duggas” and it’s all done, right? *insert buzzer here* Whoops! That’s a fail, and now you have a broken bolt. If you have been turning wrenches for a ...

Ever been strolling through a hardware store or perhaps an auto parts establishment and wondered of the meaning behind the markings on the hundreds of thousands of bolt heads on the shelf? Whether you ...