70 kr
A shiny special screw 1/4″ UNC that is 14-20 mm long with a countersunk contact surface, it also comes with a domed toothed washer. The length varies depending on what the supplier has in stock for the occasion. It has a knurled head with cross grooves. If you want a specific length, get in touch and we will check if we have that length.
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.
Check the table below. If you are unsure which thread you have, count the number of threads in 1 inch = 25.4mm
