1.3/4" x 8 UN 3" HSS Button Die - Goliath

About this item:

• 1.3/4" x 8 UN 3" HSS Button Die - Goliath
• HSS Circular Split Button Die
• HSS Button Dies (also known as Adjustable Dies) are designed for cutting external threads.
• They are used for threading rods, bolts, and studs, either by hand using a die stock, or by machine using a floating die holder.
• They also can be used to cut smaller or larger, than factory setting, by utilising the adjusting screws in the die holder.
• Dies are manufactured with a thread chamfer to aid starting.
• M2-HSS material provides increased wear resistance and 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.