Guhring 3923-2.515 #3-56 UNF TiN HSS-E Spiral Flute Machine Tap

The Guhring Series 3923 (MPN 9039230025150 / item 21789082) is a new spiral flute machine tap in #3-56 UNF thread form, manufactured from HSS-E (cobalt-enriched high-speed steel, M35 grade) and fully coated with TiN (Titanium Nitride) for enhanced wear resistance and reduced friction. The spiral flute geometry evacuates chips back up the flute during the cut, making this tap optimally suited for through-hole and blind-hole tapping in ductile, stringy materials such as stainless steel, aluminum, and low-carbon steel. It features a modified bottoming chamfer (reduced lead-in) for threading close to the bottom of a blind hole, a 2B class of fit tolerance, H2/H3 pitch diameter limit range, right-hand cut with right-hand flute, 3 flutes, 0.2360 in thread length, and a 1.8110 in OAL with a round shank and square drive end — compatible with standard CNC and manual tapping heads and collet-style toolholders. The WN 374 designation identifies this as conforming to the German DIN/WN standard for this tap style, and the green color ring on the shank is Guhring's standard identification for the modified bottoming chamfer designation. Made in Germany.

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