Thread Forming/Cutting

Thread CUTTING Screw (Type 25)
What is the difference between Thread Forming and Thread Cutting?
Thread Cutting screws actually "CUT" material away as the screw is driven into the material.   See thread FORMING next.

Trilobular thread FORMING screw

Thread Forming screws do not remove any material. Rather, the process displaces the material to generate the thread form. Since the metal's structure is cold worked along the thread profile, the threads produced are generally stronger and have a smooth, burnished surface finish.

Double Ended Stud

Thread cutting shoulder bolt

Dog-point tri-lobular thread forming