Widia Gtd
Widia Gtd VTSFT8005 Spiral Flute Tap 3/8"-18 NPT 2 Flutes
Cuts 3/8"-18 NPT threads in a 2 9/16 in overall length with two-flute cobalt high-speed steel and black oxide finish
- Creates precise NPT threads with 3/8"-18 spiral flute design
- Cobalt high-speed steel resists wear for longer tool life
- Black oxide finish reduces friction and prevents corrosion
- Two flutes clear chips efficiently for smoother tapping
- Bottoming chamfer reaches full depth in blind holes
Precision Threading Tool
The Widia Gtd VTSFT8005 is a spiral flute tap designed to cut 3/8"-18 NPT threads in a single pass. It suits maintenance engineers and machinists who need reliable pipe-thread production in workshop or field conditions. The bottoming chamfer allows threading close to the bottom of blind holes. Two flutes provide a balance of chip evacuation and tool rigidity during the cut.
Cobalt High-Speed Steel Construction
The tap body is made from cobalt high-speed steel with a black oxide surface treatment that resists wear and reduces galling. A 2 9/16 in overall length and 1 1/32 in thread length fit standard tap holders and CNC tool changers without adapters. Right-hand cut orientation matches conventional threading operations. The 75 percent thread drill size of 9/16 in guides the operator to prepare the correct hole diameter before tapping.
Efficient Chip Management
Spiral flutes pull chips upward and out of the hole, preventing packing that can damage threads or break the tool in deep or blind holes. This geometry reduces cutting torque and heat buildup during normal use, extending tool life in materials such as steel and stainless alloys. The design eliminates the need for frequent tool withdrawal to clear chips, maintaining consistent thread quality throughout the cut.
Highlights
- Creates precise NPT threads with 3/8"-18 spiral flute design
- Cobalt high-speed steel resists wear for longer tool life
- Black oxide finish reduces friction and prevents corrosion
- Two flutes clear chips efficiently for smoother tapping
- Bottoming chamfer reaches full depth in blind holes
Specifications
| Brand | WIDIA |
|---|
Questions about this item
What thread standard does the 3/8"-18 NPT tap cut and what does that limit?
It cuts a 3/8"-18 NPT tapered pipe thread, limiting use to compatible NPT fittings and preventing straight-thread connections.
What shank and flute dimensions must the tool holder or chuck accommodate?
The tap has a 2 9/16 in overall length, 1 1/32 in thread length and two flutes, requiring a holder that clears that flute depth.
How is this bottoming tap installed and what step is often missed?
Drill a 9/16 in hole to 75 percent thread depth, then run the tap by hand with cutting fluid; the common error is skipping the correct drill size.
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