Value Collection JY4703203 Extension Tap 7/16-20 Unf

Product Description

The VALUE COLLECTION JY4703203 is a spiral point plug extension tap designed for cutting right-hand internal threads in through-holes. Built from high-speed steel with a bright uncoated finish, this tap produces 7/16-20 UNF threads to a 3B class of fit, making it suitable for applications that require standard tolerance threaded connections. The H3 thread limit designation ensures consistent oversize compensation for plated or close-tolerance work. At 6 inches overall length, the extended reach allows threading in recessed or deep-cavity locations that standard-length taps cannot access. Machinists, maintenance technicians, and toolroom personnel will find this tap well suited for production and repair threading operations.

This extension tap is appropriate for use in ferrous and non-ferrous materials where 7/16-20 UNF through-hole threading is required. The spiral point geometry pushes chips ahead of the tap and out of the hole, making it effective in through-hole applications on manual drill presses, CNC machining centers, and tapping machines. The reduced shank design allows the tap to seat in standard tap holders or chucks with smaller collet diameters. Typical applications include repair threading in machine frames, fixtures, and assemblies where extended reach is necessary.

Key Features

• Spiral point flute geometry pushes chips forward for efficient through-hole threading
• High-speed steel construction provides hardness and wear resistance across common workpiece materials
• 6-inch overall length extends reach into recessed bores and deep cavities
• H3 thread limit maintains tolerance for close-fit and post-plating applications
• Reduced shank accommodates standard tap holders and smaller-bore chucks
• Bright uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use tap for any application requiring 7/16-20 UNF right-hand internal threads in through-hole configurations with a 3B class of fit.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with tapping procedures and cutting fluid requirements. Always secure the workpiece and ensure proper alignment before beginning the threading operation to avoid tap breakage. Use an appropriate cutting or tapping fluid for the workpiece material, and back the tap off periodically to clear chips when working in tougher alloys. Follow applicable shop safety standards and machine guarding requirements when operating tapping equipment.