Hertel 87019 Hand Tap 1-1/16-12 Hss 4-flute Taper Rh

Product Description

The HERTEL 87019 is a straight-flute hand tap designed for cutting internal threads in a 1-1/16-12 Unified National Special (UNS) thread form. Made from high speed steel with a bright, uncoated finish, this tap is suited for threading operations where manual torque control is required. It features a taper chamfer to ease thread entry and is ground to an H4 thread limit for applications requiring a tighter tolerance fit. The overall length is 4 inches with a thread length of 1-1/2 inches. Installation is performed by hand with a tap wrench or suitable driver. This tap is intended for right-hand thread cutting in ferrous and non-ferrous materials where a 1-1/16-12 UNS thread is specified.

This tap is used in general metalworking, maintenance, repair, and manufacturing environments where UNS thread forms are required. The taper chamfer configuration makes it appropriate as a starting tap when threading through-holes or beginning a blind-hole threading sequence. It is commonly used by machinists, millwrights, and tool-and-die professionals working with larger fastener sizes in industrial and heavy equipment applications.

Key Features

• 1-1/16-12 UNS right-hand thread form for non-standard thread specifications
• Taper chamfer for controlled thread entry and reduced starting torque
• H4 thread limit for applications requiring defined tolerance control
• High speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish — suitable for use with cutting fluid or tapping compound
• 4-flute straight-flute geometry for chip clearance in through-hole and moderate-depth applications

Compatibility

Designed for use in any application requiring a 1-1/16-12 UNS right-hand internal thread. Compatible with standard tap wrenches and holders sized for the 0.896-inch shank diameter and 0.672-inch square drive.

Installation Notes

This tap is installed by licensed machinists or qualified tradespeople using a tap wrench or machine holder appropriate for the shank and square size. The workpiece and any power equipment must be secured and de-energized before beginning the threading operation. Use a cutting fluid or tapping compound suitable for the workpiece material to reduce friction and extend tap life. Do not force the tap if resistance increases suddenly — back off to clear chips before continuing.