Sir Joseph Whitworth, the English mechanical engineer and inventor, devised a uniform threading system in 1841 to address the incompatibility problem. The Whitworth thread form is based on a 55 degree thread angle with rounded roots and crests.

When did threaded pipe begin?

The history of pipe and pipe threading dates back to development in 1820 by Robert Briggs at Pascal Iron Works of the Morris Tasker Co. Located in Philadelphia PA, Robert created his first gage in 1834 to examine internal pipe threads.

Who invented NPT?

Within the framework of the United Nations, the principle of nuclear non-proliferation was addressed in negotiations as early as 1957. The NPT process was launched by Frank Aiken, Irish Minister for External Affairs, in 1958. The NPT gained significant momentum in the early 1960s.