Goliath UN HSS Hexagonal Die Nut For External Thread

• Hexagonal HSS Die Nut for External Threads
• High Speed Steel (HSS) Die Nuts
• Goliath solid High Speed Steel (HSS) Die Nuts are used for cutting of new male 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 accessibility.
• HSS Die Nuts have a vastly longer tool life than Carbon dies as well as superior thread accuracy.
• In almost all thread series, the number of threads per inch decreases as the diameter increases.
• It became obvious to engineers using very large bolts on bridges and similar structures that this practice makes no sense for very large bolts.
• So for large bolts, three series were defined in which all diameters have the same pitch; they are simply lists of standard diameters.
• All the bolts in the 8N series had 8 threads per inch, all in the 12N series had 12 threads per inch (used in boilers and for thin nuts on shafts), and in 16N, sixteen threads per inch (used where precise positioning of a big nut is required e.g., for bearing adjusting nuts).
• The N constant-pitch series were later replaced by the constant-pitch Unified Thread series, which have the Unified thread form and are designated 4-UN, 8-UN, and so on.
• Sometimes, for a particular diameter, the constant-pitch happens to be the same as the pitch in another Unified Thread series, in which case the fasteners are identical.