Greenfield Threading
Greenfield Threading Spiral Point Tap 3/8"-16 UNC 3 Flutes TiN 285552
Cuts 3/8"-16 UNC threads in through-holes using a spiral-point design that pushes chips ahead, made from TiN-coated high-speed steel with three flutes for right-hand tapping to class 2B-3B fit
- Right-hand UNC threading for standard 3/8"-16 holes
- TiN coating extends tap life in steel applications
- Spiral point pushes chips forward through the flutes
- Three-flute design balances strength and chip clearance
- H5 thread limit produces 2B-3B class fit
Spiral Point Tap 3/8"-16 UNC
This Greenfield Threading spiral point tap cuts 3/8"-16 UNC threads in through-holes. The plug chamfer starts cleanly and pushes chips ahead of the cut. Three flutes on high-speed steel provide steady chip evacuation. TiN coating reduces friction and extends tool life in general-purpose machining.
High Speed Steel TiN Coated 3 Flutes
The tap requires a 0.3125 in drill for 75 percent thread engagement and fits 2B to 3B class of fit. Right-hand cutting suits standard threading operations. H5 thread limit controls tolerance for consistent results. The 3/4 in thread length and 2 15/16 in overall length suit typical through-hole depths without special holders.
Upgrade From Uncoated or Two-Flute Taps
The TiN coating and third flute replace uncoated or two-flute taps when longer tool life and smoother chip flow are needed. The jump is worth it for repeatable production runs in steel or stainless where coating wear resistance pays off. Not for blind holes or left-hand thread requirements where spiral flute or left-hand tools are necessary.
Highlights
- Right-hand UNC threading for standard 3/8"-16 holes
- TiN coating extends tap life in steel applications
- Spiral point pushes chips forward through the flutes
- Three-flute design balances strength and chip clearance
- H5 thread limit produces 2B-3B class fit
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
How does the H5 thread limit affect hole fit during long production runs?
The H5 limit targets a 2B-3B class of fit, keeping thread tolerance tight even after repeated tapping cycles.
Does the TiN coating reduce heat buildup when the tap runs continuously in steel?
TiN lowers friction and resists wear, so the cutting edges stay cooler during extended use in steel workpieces.
What drill size must I have on hand before using this 3/8"-16 tap?
A 0.3125 in drill is specified for 75 percent thread engagement with this tap.
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