20 NF and also a pipe thread plug. Designed For Use With Taps, Reamers. Screw Extractors & Other Tools With A Square Shank. Adjusted & Tighten To Size By Twisting Knurled Nut.
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We only accept the unopended/unused products. Our team will do our best to solve any issue. "Item arrived quickly, no issues, will trade again for sure". This item is in the category "Home & Garden\Tools & Workshop Equipment\Hand Tools\Taps & Dies". The seller is "cometwarehouse" and is located in this country: US.This item can be shipped to United States.