'ACME' is really a time period that refers to a certain thread kind. All ACME screws may also be lead screws but not all lead screws are ACME screws. The ACME thread typical is accompanied by distinct classes such as 2G, 3G, 2C and many others. Flathead screwdrivers are generally https://types-of-roof-flashing40527.digitollblog.com/29165460/what-does-types-of-screwdriver-heads-names-mean