SPECIAL PIPE TAP EXTRA LONG 1/4"NPTF X 18-12" LONG Extension taps have an extended shank to reach inaccessible, long reach holes. This Tap Come With Interrupted Thread These taps have an odd number of lands with alternate teeth in the thread helix removed. The removal of every other tooth helps to break the chip and allows a greater supply of lubrication to reach the cutting teeth, reducing the incidence of torn threads.
I HAVE 4 BRAND NEW 3/8-16 TAPS BY PREMIER: LIST $18.20 EACH Spiral Flute Taps UNC Coarse Pitch Blue Ring HSS-V: 2% Vanadium Used in general machine tapping applications for mild carbon steels such as 1018, 1010, 1035, 1045, 1050 and 1065 Up to 25 HRC
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