Hertel K027785AS25 Hand Tap M16x1.50 Plug Tin Hss

Product Description

The HERTEL K027785AS25 is a straight-flute hand tap designed to cut M16x1.50 Metric Fine internal threads in a shop or field environment. It is manufactured from High Speed Steel (HSS) with a Titanium Nitride (TiN) coating that increases surface hardness and extends tool life in ferrous and non-ferrous materials. The plug chamfer - typically 3 to 5 threads - allows the tap to start easily in a through-hole or a partially pre-threaded bore. With 4 flutes and a D6 thread limit, it holds tight tolerances suitable for close-fit fastener applications. Overall length is 3-13/16 inches with a 1-13/16 inch thread length. The 0.4800 inch shank diameter accepts standard tap wrenches or holders in that size range.

This tap is used in machine shops, maintenance facilities, and manufacturing environments wherever M16x1.50 Metric Fine threads are required. The straight-flute design is best suited for through-holes or shallow blind holes in materials that produce short, brittle chips. It is a hand-tap configuration, meaning it is driven by a tap wrench or holder rather than a CNC rigid-tapping cycle, though it can be used in sensitive tapping attachments. Machinists, toolmakers, and maintenance technicians are the primary users.

Key Features

• M16x1.50 Metric Fine thread form - right-hand cut
• TiN coating increases wear resistance and reduces friction for longer tool life
• Plug chamfer (3-5 thread lead) for straightforward starting in through-holes
• D6 thread limit for consistent, close-tolerance thread fit
• 4 straight flutes suited for through-holes and short-chip materials
• No coolant-through requirement - compatible with hand-tap lubrication practice

Compatibility

Designed as a standard hand tap for use in any application requiring M16x1.50 Metric Fine right-hand internal threads. The 0.4800 inch shank fits standard tap wrenches and holders sized for that shank diameter.

Installation Notes

Secure the workpiece before tapping and ensure the pre-drilled pilot hole matches the correct tap drill diameter for M16x1.50 Metric Fine threads. Use an appropriate cutting fluid or tapping compound for the work material to reduce heat and prevent galling. Back the tap off periodically to break chips and clear the flutes. Inspect the tap for wear or chipping before each use - a damaged tap can cross-thread or seize in the bore.