Machine Screws: Divided into many varieties due to head shape and groove shape. The head type has a cylindrical head, a pan head, a countersunk head and a semi-recessed head. The head groove shape is generally a slotted ...
Self-tapping screws are generally manufactured by cold heading process, hot heading (pressing) process, cold extrusion extrusion process or cutting process, for self-tapping screws with a nominal diameter of 0.750 in or ...
Screw surface inspection is divided into two kinds, one is after the screw is not produced before the plating of the test, the other is the screw after the plating of the test, which means that after the screw is hardene...
The first person to describe the spiral was the Greek scientist Archimedes (circa 287 BC - 212 BC). The Archimedean spiral is a giant spiral mounted in a wooden cylinder that lifts water from one level to another and irr...
Screws are tools that use the physics and mathematics of an object's beveled circular rotation and friction to gradually fasten mechanical parts. Screws are a common term for fasteners, spoken daily. Screws are indispens...
