3/4-10 ACME 2G thread screw refers to a specific size and pitch of the ACME thread,where 3/4" denotes the major diameter and 10 represents the number of threads per inch.This ACME thread is a single-start thread,meaning there is only one helical ridge wrapped around the cylinder.The 2G class indicates the thread fit,where 2G provides a general-purpose fit suitable for most applications.