F3307/16X1 UNF Adjustable Dies

Adjustable circular split die, for Unified National Fine thread UNF 7/16" with 20 TPI, to reduce the torque when cutting by hand split dies can be adjusted in small increments up to a maximum of approximately 0.006", dimensions according to BS 1127:1950 standard with 1" outside diameter and 3/8" thickness, HSS with bright finish for threading in free machining and plain carbon steel, ferritic stainless steel and gray, malleable, ductile and compacted graphite cast-iron