Acme (Standard) vs European Threads Broom and brush handles often have threaded ends, or ends that require screwing into a brush or broom with the pairing thread insert. At R.S. Quality Products, we offer products with both acme (standard) and European thread types. American broom and brush manufacturers make acme threaded handles and brushes. European brush manufacturers make handles with European threads. The two types of handles are not interchangeable. For example, you cannot use a handle with acme threads on a floor brush that has European threads. When purchasing products, there aren’t many advantages to one kind over the other. However, it is vital you purchase the matching thread type. Below are some details to help you understand these different thread types. Acme (Standard) Thread European Thread Tips with acme (standard) threads Tip with European threads https://www.rsquality.com/content/blueion/Worksheets/Standard vs European Threads.pdf
There are two main systems for measuring distances and weight, the Imperial System of Measurement and the Metric System of Measurement. Most countries use the Metric System, which uses the measuring units such as meters and grams and adds prefixes like kilo, milli and centi to count orders of magnitude. In the United States, we use the older Imperial system, where things are measured in feet, inches and pounds. It might be confusing if you are living in the U.S for the first time and are not used to this system. If you ask someone for directions, they will probably tell you something is a certain number of miles away. Or you may be told to move a few feet… But, whose feet? Imperial vs. Metric System · Career Training USA · InterExchange
Americans call spanners 'wrenches' and theirs are often marked 'AF' which allegedly stands for the dimension 'Across Flats' but in actual fact is an acronym for 'American 'fred' which is quite handy.
Then of course you don't get as much fluid in a Yank Imperial Gallon compared to a British Imperial Gallon. Probably the only thing in America that isn't bigger.!!!
Hold on I'm just putting my oily rag down so I can bash the top of the television to get the picture back.