5/16" x 18 BSW HSS Die Nut - Goliath

About this item:

• 5/16" x 18 BSW HSS Die Nut - Goliath
• 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.
• British Standard Whitworth angle of thread is 55 degrees as opposed to 60 degrees in Metric and Unified threads.
• This thread form was developed by Sir Joseph Whitworth in 1841.
• The thread form has rounded roots and crests and is specified in BS84:1956.