Goliath 1 1/2" x 11.5 NPT 4" HSS Button Die - Goliath F89YJH

Features:

• 1 1/2" x 11.5 NPT 4" HSS Button Die - Goliath
• HSS CIRCULAR SOLID 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.
• Dies are manufactured with a thread chamfer to aid starting.
• M2-HSS material provides increased wear resistance and superior thread accuracy.
• National Pipe Tapered (NPT) is a US standard for tapered threads used to join pipes and fittings.
• ANSI/ASME standard B1.20.1 covers threads of 60º form with flat crests and roots.
• The taper on NPT threads allows them to form a seal when torqued as the flanks of the threads compress against each other.
• However a clearance remains between the crests and roots of the threads, resulting in a leakage around this spiral.
• This means that NPT fittings must be made leak free with the aid of thread seal tape or a thread sealant compound.
• For each 12" increase in distance from the end, the diameter increases by 3/4".