Goliath NPT HSS Hexagonal Die Nut

• 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.
• 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".