Drillco 25A316P 2-1/4-8 HSS Plug Tap
Drillco 25A316P supplies the 2-1/4-8 thread size for large-diameter threading jobs. Compare it carefully with nearby eight-TPI sizes: the shared pitch does not make a 2-1/8-inch or 2-inch tap interchangeable with this 2-1/4-inch model.
Specifications and included details
- 2-1/4-inch nominal thread diameter with eight threads per inch.
- Plug tap made from high-speed steel.
- Black oxide finish and reduced neck for clearance.
- Standard square shank; listed spiral-point cutting design.
Before ordering
Choose by the complete 2-1/4-8 designation and verify the required thread direction, tap dimensions and holder capacity. Broader series diameter claims do not describe this tap's individual size. Confirm chip space and thread-depth requirements rather than treating reduced-neck construction as an unlimited-depth rating.
Product questions and answers
Will this cut a 2-1/8-8 thread because the pitch is the same?
No. It is a 2-1/4-8 tap. Both diameter and pitch must match the required thread.
Does reduced neck specify a maximum tapping depth?
No. It describes the neck construction; no maximum depth is provided here. Check the tool dimensions and workpiece requirements.
Is the square shank a standard drill-bit hex fitting?
No. It is a square tap shank. Confirm the correct tap holder and its opening rather than using a hex quick-change bit holder.
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