Greenfield Threading
Greenfield Threading Spiral Point Tap 285479 pneumatic accessory
A spiral-point tap cuts 5/16-24 UNF threads in through-holes using high-speed steel with TiN coating
- Spiral-point design pushes chips ahead for cleaner threads
- High-speed steel with TiN coating resists wear during repeated use
- Right-hand UNF 5/16-24 thread fits standard automotive fasteners
- Three-flute geometry balances strength and chip clearance
- 75 percent thread drill size I matches common tap-drill charts
Greenfield Threading Spiral Point Tap 285479
This pneumatic accessory is a spiral point tap designed for creating internal threads in through-hole applications. It suits machinists and maintenance technicians who require reliable thread cutting in metal components using pneumatic tapping equipment. The tool is supplied new and ready for workshop use.
UNF 5/16 In. -24 Thread Specification
The tap cuts Unified National Fine threads at 5/16 inch diameter with 24 threads per inch. Its thread limit H5 and class of fit 2B-3B define the tolerance range for the finished thread. The 75 percent thread drill size I indicates the required hole preparation before tapping. Right-hand rotation matches standard pneumatic tool operation.
High Speed Steel TiN Coated Construction
The body is manufactured from high speed steel with a titanium nitride surface coating that reduces friction and extends cutting life. Three flutes provide chip evacuation space while maintaining core strength during the 11/16 inch thread cutting depth. Overall length measures 2 23/32 inches for compatibility with standard tap holders and pneumatic drivers.
Highlights
- Spiral-point design pushes chips ahead for cleaner threads
- High-speed steel with TiN coating resists wear during repeated use
- Right-hand UNF 5/16-24 thread fits standard automotive fasteners
- Three-flute geometry balances strength and chip clearance
- 75 percent thread drill size I matches common tap-drill charts
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
Should I choose the 5/16"-24 UNF tap or a different thread size?
Select this tap when the job calls for a 5/16"-24 UNF thread; the 11/16 in thread length and 75 percent thread drill size I match that specification.
What does the H5 thread limit mean once the tap is in the machine?
The H5 limit produces a 2B-3B class of fit, giving a standard precision internal thread for general-purpose fastening.
How does the spiral-point design affect chip flow on a pneumatic driver?
The spiral point pushes chips ahead of the tap, reducing clogging in through-holes when driven by pneumatic power.
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