Hertel K008105AS Spiral Point Tap 4-48 Unf Bottoming Hss

Product Description

The HERTEL K008105AS is a spiral point tap designed for threading 4-48 UNF holes in production and maintenance applications. It features two flutes and a bottoming chamfer, making it suited for threading close to the bottom of blind holes where full thread engagement is needed near the bottom of the bore. Built from high speed steel with a bright finish, this tap delivers reliable performance in ferrous and non-ferrous materials. The H2 thread limit and Class 2B fit designation indicate a standard tolerance range appropriate for the majority of general fastener applications. Right-hand thread direction is standard.

This tap is used in machine shop, maintenance, and production environments where fine unified thread forms are required in small-diameter fastener applications. The 4-48 UNF thread size is common in precision instrument work, electronics hardware, and light mechanical assemblies. The bottoming chamfer style is selected when the threading operation must reach close to the bottom of a blind hole, distinguishing it from plug or taper chamfer alternatives. Licensed machinists and maintenance mechanics are the primary installers.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• High speed steel construction for durability across ferrous and non-ferrous workpieces
• H2 thread limit with Class 2B fit for standard general-purpose tolerances
• Two-flute design supports chip evacuation during tapping operations
• Bright finish with right-hand thread direction
• 9/16 inch thread length provides adequate engagement depth for the 4-48 UNF size

Compatibility

Designed as an OEM-style replacement or direct-use spiral point tap for 4-48 UNF threaded applications in standard machine tapping operations.

Installation Notes

This tap is installed by machinists or maintenance mechanics using a tap wrench, tapping head, or CNC machine spindle. Ensure the workpiece is securely fixtured and the tap is properly aligned to the hole axis before beginning. Use an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Follow standard shop safety practices and machine guarding requirements when power tapping.