Bordo 1/8" x 40 BSW 1" Chrome Button Die 4808-1/8-1D

Features:

• 1/8" x 40 BSW 1" Chrome Button Die
• British Standard Whitworth (BSW).
• Split circular chrome alloy button dies are most commonly used in conjunction with a die stock handle.
• They can be used as thread chasers to clean an existing thread.
• They can also be used to create a new male thread on non-ferrous metals and plastics.
• Chrome alloy dies are not suitable for creating precision, safety or critical threads.
• The BSW thread form was developed by Sir Joseph Whitworth in 1841.
• The thread form has rounded roots and crests and is specified in BS84:1956.
• The thread angle for BSW is 55º as opposed to 60º in Metric and Unified threads.