If you need to remove some broken bolts, you don't necessarily need a drill to get the job done. Here is how to handle the ...

The clever 3-thread rule will enable you to fix engagement problems when using bolts, and it will also help you avoid issues ...

The strength of some internal threads is more sensitive to tap diameter than previously thought. • Cold-formed threads are no stronger than cut threads when holes are correctly sized. • Cut threads ...

Few things disturb us more than the bewilderment of a broken bolt or seized pipe plug in a casting. You’re at a loss for how to get the darned thing out. This is when you have to slow down and come up ...

Thermal effects can increase or decrease bolt load and clamping capability. Measuring the angle of nut rotation can sometimes be used to gage preload. Modeling the ...

Threaded fasteners are galvanized in specialized galvanizing facilities that centrifuge the fasteners to remove excess zinc from the threads. Australian Standard AS1214 recommends the obligatory ...

Few things seem more hopeless than when you’re in the process of removing a bolt, screw, or stud and it breaks. At that point, you know it’s all over but the crying. You’ve busted a bolt off in a ...

Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...