Hertel K014592AS25 Spiral Point Tap 7/16-20 Unf Hss Tin

Product Description

The HERTEL K014592AS25 is a spiral point tap designed for cutting 7/16-20 UNF internal threads in through-hole applications. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, it delivers improved wear resistance and tool life compared to uncoated HSS taps. The plug chamfer distributes cutting load across several leading threads, making it well suited for through-hole threading where a chip-pushing action is preferred. With 3 flutes and a right-hand thread direction, this tap follows standard setup for the majority of machine and hand tapping operations. It carries an H1 thread limit, indicating a tight tolerance fit appropriate for precision threading work.

This tap is intended for threading 7/16-20 UNF through-holes in ferrous and non-ferrous materials where a plug-style entry is specified. It is commonly used in machine shops, maintenance and repair environments, and production settings where UNF fastener thread forms are required. The 1-7/16-inch thread length accommodates typical material stack thicknesses encountered in general fabrication and assembly work. Machinists, tool and die makers, and maintenance technicians are the primary users.

Key Features

• 7/16-20 UNF thread form with right-hand cutting direction
• High speed steel construction for durability across a range of workpiece materials
• TiN coating increases surface hardness and reduces friction during cutting
• Plug chamfer (3-5 thread lead) suits through-hole tapping and chip-forward action
• H1 thread limit for close-tolerance thread fit
• 3-flute design balances chip evacuation and tool strength

Compatibility

Designed as a standard replacement or production tap for through-hole 7/16-20 UNF threading operations in machine tapping or hand tapping setups.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians using a tapping machine, CNC machining center, or hand tap wrench. Ensure the workpiece is securely fixtured and the tap is properly aligned with the drilled pilot hole before starting. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Do not force the tap if resistance increases unexpectedly; back off to clear chips before continuing.