Typically, we’ll throw a simple helical spring lock washer on a stud or bolt, torque down the nut nice and snug, and call it a day, feeling like we’ve made a secure joint. But nothing could ...

A phone is held together with about 75 fasteners, a car with 3,500, and a jet plane with 1,500,000. The SR-71 Mach 3 spy plane is built of titanium, with titanium nuts and bolts. The sockets also ...

Unless you are a mechanical engineer, you might not realize there’s a lot of nuances to something even as simple as a nut and bolt. How many threads do you need to engage? Do lock washers work?