What is the difference between bolt and screw?
Bolt: Generally used with a nut.
Screw: Screw requires at least on component with a thread or called “Male thread” .”female thread” means “internal thread”. But even now, there is confusion in distinguishing between “screw” and “bolt”.
Origin of screw
The origin of screws is not clear.
According to contemporary history, the first screw was made for a machine . Some say that the thread structure could only be imagined by a genius mechanicist like Archimedes.
Production method and development of standardization
1850s In Europe, the cold forging method Began to develop, a large number of interchangeable screws were made.
After the interruption of the World War II period, the International Organization Standardization (ISO) was established in 1947. and the international standardization was promoted even with screw standards. The “ISO metric thread” standard was enacted.