Value Collection JY4704136 Extension Tap 1/2-13 Hss

Product Description

The VALUE COLLECTION JY4704136 is a spiral point plug extension tap designed for cutting 1/2-13 UNC internal threads in through-hole applications. Built from high-speed steel with a bright, uncoated finish, this tap delivers reliable performance in general-purpose threading operations across ferrous and non-ferrous materials. The spiral point geometry pushes chips ahead of the cut, making it well suited for through-hole work where chip evacuation is critical. With an H3 thread limit and a 3B class of fit, it produces threads that meet standard tolerance requirements for most mechanical fastening assemblies. A reduced shank allows use in standard tap holders and extension holders, and the 6-inch overall length provides reach in deep or obstructed workpiece locations.

This extension tap is used in machining and fabrication environments where standard-length taps cannot reach the work. Typical applications include tapping recessed bores, deep fixtures, or workpieces mounted in setups that require additional clearance between the tool holder and the part surface. It is appropriate for right-hand threading in production and maintenance machining on manual mills, drill presses, and CNC equipment with rigid tapping capability. Machinists, tool and die makers, and maintenance technicians working in metal fabrication and industrial maintenance settings are the primary installers.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• 1/2-13 UNC thread size with H3 thread limit for consistent 3B class of fit tolerances
• 6-inch overall length provides extended reach in deep or obstructed setups
• High-speed steel construction handles general-purpose threading in a range of materials
• Bright, uncoated finish allows visual wear inspection during service
• Reduced shank design compatible with standard tap and extension holders

Compatibility

Designed as an OEM-style replacement or direct-use extension tap for any application requiring a 1/2-13 UNC right-hand thread in through-hole configurations with standard 3B class of fit.

Installation Notes

Extension taps should be installed and operated by qualified machinists familiar with tapping speeds, cutting fluid requirements, and tap holder alignment for the specific workpiece material. Always secure the workpiece and ensure the tap is properly aligned to the drilled pilot hole before engagement to prevent tap breakage. Cutting fluid appropriate to the workpiece material should be applied throughout the tapping cycle. Follow all applicable shop safety procedures and equipment manufacturer guidelines when operating tapping equipment.