This is a 4-40 Die from K&S Engineering.
A must for the scratch builder, modeler, etc. Rethreads 4-40 thread pattern. Intended for use on K+S Aluminum and Brass Stock
Includes: One 4-40 Die
Thread Pattern: 4-40
Diameter: ¾" (19mm)
Note: Use oil when cutting threads. Slowly cut the threads for the best results.
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