High Speed Steel (HSS) Dienuts
Goliath solid High Speed Steel (HSS) Dienuts are used for cutting of new threads as well as extending / cleaning / resizing of existing threads where a button die is not suited due to work space restrictions and / or on site thread accessability. HSS Dienuts have a vastly longer tool life than Carbon dies as well as producing more accurate threads.
UNIFIED NATIONAL FINE
This thread form was introduced in 1948 as an attempt to standardise thread forms in the USA, Canada and the UK. The thread profile of UNF is the same as for metric threads and is described in the JIS B0206 standard. The thread is described by its major diameter and the number of threads per inch of length (TPI). When used on external threads this series has greater tensile stress area than coarse threads of the same size. Fine series threads will resist stripping out better than coarse threads in areas where the external and mating internal threads are subjected to loads equal to or greater than the capacity of the screw or bolt. Fine threads are also used where the length of engagement is limited 1-1/4 or where wall thickness demands a fine pitch.