Straight Flute Hand Tap Set, HSS, 7/8"-14, 4 Flutes

Set of straight flute hand taps for Unified National Fine thread UNF 7/8" with 14 TPI and 3B class of fit with H4 pitch diameter limits, consisting of 1 tap with a 6-8xP taper lead, 1 tap with a 4-6xP second lead and 1 tap with a 2-3xP plug lead, dimensions according to ANSI standard with 0.6970" shank and 0.5230" square drive, HSS with bright finish for 1.5xD through or blind hole threading in general purpose applications.