Greenfield Threading 174505 Tap Set 1/2"-20 UNF 4 Flutes

Greenfield Threading 1/2"-20 UNF Tap Set

This Greenfield Threading tap set provides three essential thread-cutting tools for 1/2"-20 UNF right-hand threads. It includes bottoming, plug and taper styles, each with four flutes for efficient chip removal. Machinists and maintenance technicians use these taps to create precise internal threads in metal components. The high-speed steel construction with TiN coating supports durability across repeated threading operations.

H3 Limit 3B Fit Sustained Cutting

Under sustained load, the H3 thread limit and Class 3B fit maintain consistent thread geometry through extended production runs. The four-flute design distributes cutting forces evenly, reducing vibration and tool wear during continuous use. TiN coating lowers friction and heat buildup, preserving sharp edges longer than uncoated alternatives. The 1 21/32 in thread length and 3 3/8 in overall length provide stable engagement in deeper holes.

Upgrades from Single-Style Taps

This set replaces individual bottoming, plug or taper taps when a workshop needs all three thread-starting options in one package. The jump is worth it for shops that regularly cut 1/2"-20 UNF threads across varied hole depths and materials. Buyers who only ever use one tap style or work with different thread standards will not benefit from the combined set. The coordinated H3 limit ensures interchangeable use without fitment variation.