Hertel 87026 Hand Tap 1-1/2-8 Uns Plug 4-flute Hss

Product Description

The HERTEL 87026 is a 1-1/2-8 UNS right-hand plug tap ground from bright high speed steel for hand-tapping and machine-tapping applications in ferrous and non-ferrous materials. The plug chamfer — typically 3 to 5 threads — allows the tap to start easily in through-holes and blind holes with adequate clearance. Four straight flutes provide chip clearance and cutting stability at this large thread diameter. Overall length is 6-3/8 inches with a 3-inch thread length, giving machinists and maintenance technicians sufficient reach for standard-depth UNS threaded holes.

This tap is suited for machine shops, maintenance and repair operations, and industrial fabrication environments where 1-1/2-8 UNS threads are required. The UNS thread form is common in specialized fastener, pipe flange, and heavy equipment applications where unified standard pitches do not apply. The H5 thread limit designates a ground tolerance class appropriate for general-purpose tapping where a moderate class-of-fit is needed. Installation is performed by hand with a tap wrench or by a low-speed machine tap holder.

Key Features

• 1-1/2-8 UNS right-hand thread form with H5 ground thread limit for consistent tolerance control
• Plug chamfer (approximately 3-5 leading threads) eases entry in both through and blind-hole applications
• 4-flute straight-flute geometry provides chip clearance and cutting stability at large diameters
• Bright uncoated high speed steel finish suitable for use with cutting fluids on a wide range of materials
• 6-3/8 inch overall length with 3-inch thread length accommodates standard-depth UNS threaded holes

Compatibility

Designed as an OEM-style replacement or direct application tap for any operation requiring a 1-1/2-8 UNS right-hand plug tap with H5 thread limit in high speed steel.

Installation Notes

This tap is installed by a machinist or maintenance technician using a properly sized tap wrench or a low-speed machine spindle with a floating tap holder. Always apply cutting fluid appropriate for the workpiece material before and during tapping to extend tool life and improve thread quality. Secure the workpiece fully before starting the tap to maintain alignment and prevent tap breakage. Worn or damaged taps should be replaced rather than reused to avoid thread damage in the workpiece.