Value Collection MSC-04558144 Spiral Point Tap 7/8-14 Unf

Product Description

The VALUE COLLECTION MSC-04558144 is a spiral point tap designed for cutting internal threads in through-hole applications. Built from high speed steel (HSS) with a bright, uncoated finish, this tap produces clean 7/8-14 UNF right-hand threads with consistent accuracy. The spiral point geometry pushes chips forward ahead of the cutting action, reducing clogging and allowing smoother feed in production and maintenance environments. The H4 thread limit provides a controlled fit suitable for 3B class tolerances. This tap is a standard tool for machinists, maintenance technicians, and metalworking tradespeople working with ferrous and non-ferrous metals.

This tap is suited for through-hole threading operations in general machining, repair, and fabrication work. The plug chamfer — with its moderate lead-in — makes it appropriate for starting threads in holes that are open at both ends. At 7/8-14 UNF, it is commonly used in mechanical assemblies, fluid fittings, and fastener applications that require fine-thread engagement. The 2-7/32 inch thread length accommodates a wide range of material thicknesses. Coolant-through is not supported on this tap.

Key Features

• Spiral point design pushes chips forward for efficient through-hole threading
• 7/8-14 UNF thread form with right-hand cutting direction
• Plug chamfer provides reliable thread entry in open through-holes
• H4 thread limit holds 3B class of fit tolerances
• High speed steel construction for durability across ferrous and non-ferrous workpieces
• Bright uncoated finish — no coating buildup to affect thread dimensions

Compatibility

Designed for use in standard tap handles, machine tap holders, and CNC tapping chucks that accept 7/8-14 UNF spiral point plug taps with a 3-flute geometry.

Installation Notes

This tap should be installed by a qualified machinist or maintenance technician familiar with threading operations. Always secure the workpiece and ensure the tap is properly aligned with the drilled pilot hole before applying torque. Use an appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Inspect the tap for wear or chipping before each use and replace if cutting edges are degraded.