Generally
Stainless shiny star screw recessed with lumpy skull. 8-32 thread = 4.17mm diameter
10 kr
Stainless shiny star screw recessed with lumpy skull. 8-32 thread = 4.17mm diameter
Check the picture how to measure the length of a screw with a countersunk head.
The difference between UNC and UNF is the number of threads per inch.
UNF is fine-threaded with more threads per inch than the coarse-threaded UNC thread.
The smaller sizes are divided from 0 to 12 and are called numerical threads
The larger sizes start with 1/4″ and so on.