Greenfield Threading
Greenfield Threading 174505 Tap Set 1/2"-20 UNF 4 Flutes
A 1/2"-20 UNF tap set with bottoming, plug and taper taps in high-speed steel with TiN coating
- 1/2"-20 UNF threads for precise fastening
- 4-flute design clears chips efficiently
- High-speed steel with TiN coating resists wear
- Bottoming, plug and taper taps cover full depth
- 3 3/8" overall length fits standard holders
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.
Highlights
- 1/2"-20 UNF threads for precise fastening
- 4-flute design clears chips efficiently
- High-speed steel with TiN coating resists wear
- Bottoming, plug and taper taps cover full depth
- 3 3/8" overall length fits standard holders
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
How much heat does the 1/2"-20 UNF tap generate during extended threading sessions?
The high-speed steel body with TiN coating reduces friction, keeping temperatures manageable during continuous cutting in steel or aluminium.
Which tap wrench or handle fits the 3 3/8 in overall length and 1 21/32 in thread length?
A standard adjustable tap wrench sized for 1/2 in. shanks engages the square drive securely for hand or powered operation.
Will the H3 thread limit and 3B class of fit match the UNF holes in my older fixture plates?
Yes, the H3 limit and 3B fit are standard for 1/2"-20 UNF, so threads cut with this set will gauge correctly on legacy parts.
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