Threading set HS-30UNC ( 18 Pcs ) in metal cassette to produce Unified National Coarse threads from UNC 1/4" up to UNC 1/2", consisting of 5 HSS bright finished straight flute hand tap E515-NO1 with a 6-8xP taper lead, 5 HSS bright finished straight flute hand taps E515-NO3 with a 2-3xP plug lead, 5 HSS bright finished adjustable circular split dies F320, 1 straight handle tap wrench L112 for taps with a square drive within a range from 1 up to 10mm and 2 straight handle die stocks L110 for dies with an outside diameter and thickness within a range from 1x3/8 up to 1.5/16x7/16" for 1.5xD through or blind hole threading in free machining steel and copper or copper alloys
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