No. of flutes - 4".Pitch diameter limits: H4.Tapered.Ground thread taps produce a tighter thread tolerance than cut thread taps.Designed to .0005" pitch diameter tolerance.Straight fluted, hand taps.Made in USA.Plug Tap # 313310 shown in image.
Hanson 310440 High Speed Steel Ground Thread Fractional Tap - 1 1/4" - 7NC
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