Hertel K008568AS Spiral Point Tap 5/8-11 Unc Hss

Product Description

The HERTEL K008568AS is a spiral point tap designed for cutting 5/8-11 UNC internal threads in through-hole applications. Built from high speed steel (HSS) with a bright finish, this tap drives chips forward ahead of the cutting edge, keeping the flute area clear and reducing the risk of chip packing. The plug chamfer provides a gradual lead-in suitable for most standard through-hole tapping operations. With an H11 thread limit and a 0.005-inch oversize designation, it is sized to produce threads at the upper tolerance range, which accounts for plating or coating allowances on finished workpieces. Three flutes provide adequate chip clearance and strength at this diameter.

This tap is suited for machine tapping operations in production and job-shop environments where 5/8-11 UNC through-holes are required. The right-hand cutting direction and plug chamfer make it compatible with standard CNC machining centers, drill presses with tapping attachments, and dedicated tapping machines. It is intended for use in ferrous and non-ferrous metals where high speed steel tooling meets the required cutting speed and hardness demands. Coolant-through capability is not featured on this tap; external flood or mist coolant is recommended for extended runs.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• High speed steel construction provides durability across a range of workpiece materials
• Plug chamfer (7-10 thread lead) suits standard through-hole entry conditions
• H11 thread limit with 0.005-inch oversize accommodates post-tap coating or plating
• Right-hand thread cutting direction for use with standard machine spindle rotation
• Bright finish — no coating applied, allowing direct inspection of tool condition

Compatibility

Designed for cutting 5/8-11 UNC right-hand internal threads in through-hole configurations; compatible with standard tapping chucks and floating tap holders sized for this tap body diameter.

Installation Notes

This tap should be installed by a qualified machinist or tooling technician using a properly sized tapping chuck or floating holder to allow axial float and prevent thread distortion. Always ensure the machine spindle is fully stopped and the workpiece is securely fixtured before tool changes. Use appropriate cutting fluid or flood coolant for the workpiece material to extend tool life and maintain thread quality. Do not exceed the recommended surface footage for high speed steel tooling in the material being tapped.