Value Collection BDNA-20664 Spiral Point Tap 1/2-13 Unc

Product Description

The VALUE COLLECTION BDNA-20664 is a spiral point tap designed for threading 1/2-13 UNC holes in metalworking and fabrication applications. Built from high speed steel (HSS) with a bright uncoated finish, this tap pushes chips forward ahead of the cutting zone, making it well suited for through-hole tapping operations. The plug chamfer provides a standard lead-in with moderate starting ease. With an H3 thread limit, the tap produces threads with a controlled oversize tolerance appropriate for standard fastener fit applications. It is a right-hand tap intended for use with conventional right-hand threading operations.

This tap is used in machine shop, maintenance, repair, and fabrication environments where 1/2-13 UNC threads are required in through-hole configurations. It is appropriate for use in ferrous and non-ferrous metals where chip-pushing taps outperform spiral flute designs. Machinists, maintenance technicians, and trade professionals working in HVAC, plumbing, and electrical panel fabrication regularly use taps of this specification for tapping mounting holes, equipment frames, and structural members.

Key Features

• 1/2-13 UNC thread form for standard inch-series fastener compatibility
• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• High speed steel construction provides durability across common work materials
• Bright uncoated finish suits general-purpose use without additional coating cost
• H3 thread limit delivers controlled oversize tolerance for standard fit threads
• Right-hand cut, plug chamfer for conventional machine or hand tapping

Compatibility

Designed as a general-purpose replacement or stock tap for any application requiring a 1/2-13 UNC spiral point plug tap in high speed steel with an H3 thread limit and bright finish.

Installation Notes

Tapping operations should be performed by a machinist or qualified trade technician using a calibrated tap wrench, drill press, or CNC machine set to the appropriate feed rate for the material. Ensure the pilot hole is drilled to the correct tap drill size for 1/2-13 UNC threads before beginning the tapping operation. Use appropriate cutting fluid to extend tap life and improve thread quality. Inspect threads with a go/no-go gauge after tapping to verify conformance.