Hertel R837648 Extension Tap 1/2-13 Unc 3 Flute Hss

Product Description

The HERTEL R837648 is a spiral point plug extension tap designed for cutting right-hand internal threads in through-hole applications. Built from high speed steel with a bright, uncoated finish, it cuts 1/2-13 UNC threads to an H3 thread limit and 3B class of fit. The spiral point geometry pushes chips ahead of the tap and into the hole, making it well suited for through-hole tapping operations. At 6 inches overall length, the extended reach allows threading in recessed bosses, deep cavities, or locations where a standard-length tap cannot reach. Machinists and tool-and-die professionals working in production or maintenance environments are the primary users of this tool.

This extension tap is used in metalworking and machining applications where standard tap reach is insufficient. The 1/2-13 UNC thread form is common in general fastening applications across industrial, manufacturing, and maintenance repair operations. The reduced shank allows use in standard tap holders and power tapping heads designed for smaller shank diameters. It performs in manual tapping handles, drill press setups, CNC machining centers, and hand-tapping operations on ferrous and non-ferrous materials appropriate for high speed steel tooling.

Key Features

• Spiral point geometry pushes chips forward, suited for through-hole tapping
• 1/2-13 UNC thread size with H3 thread limit and 3B class of fit for standard tolerance threading
• 6 inch overall length provides extended reach into deep or recessed features
• High speed steel construction offers toughness and wear resistance across common workpiece materials
• Bright, uncoated finish with reduced shank for compatibility with standard tap holders
• Plug chamfer provides gradual thread engagement at the start of the cut

Compatibility

Designed as an OEM-style replacement or direct tooling selection for standard tap holders and power tapping setups requiring a 1/2-13 UNC spiral point plug tap with extended reach and a reduced shank.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using appropriate tap handles, tapping heads, or CNC toolholders. Ensure the workpiece is securely fixtured and the tap is properly aligned to the pre-drilled hole before engaging the cut. Use a cutting fluid appropriate for the workpiece material to promote tool life and thread quality. Disengage the tap carefully and reverse to clear chips before removing from the hole.