Hertel K008632AS Straight Flute Tap 1-8 Unc Hss

Product Description

The HERTEL K008632AS is a straight flute tap designed to cut 1-8 UNC internal threads in a wide range of materials. Straight flute geometry makes this tap well suited for through-hole and blind-hole applications in softer workpiece materials where chip evacuation is less of a concern. The plug chamfer eases starting and distributes cutting load across the first few threads. Manufactured from high speed steel with a bright uncoated finish, the K008632AS delivers consistent thread quality in production and maintenance environments. At 5.125 inches overall length with a 2.5-inch thread length, it handles standard threading depths on 1-inch fastener applications.

This tap is used in machining, maintenance, and fabrication settings where 1-inch UNC threaded holes are required. Typical applications include structural fabrication, heavy equipment repair, die and mold work, and general industrial maintenance where 1-8 UNC is the standard coarse thread specification. It is installed by machinists, millwrights, and maintenance technicians using a tap wrench or machine tapping setup. The 2B class of fit produces standard commercial-grade thread tolerances appropriate for most bolted assemblies.

Key Features

• 1-8 UNC thread form with 2B class of fit for standard commercial thread tolerance
• Plug chamfer (3-5 thread lead) for easier starting and reduced entry torque
• 4 straight flutes suited for through-hole and short blind-hole applications
• High speed steel construction provides good wear resistance across a range of materials
• Bright uncoated finish — no coating buildup to affect thread tolerance
• H6 thread limit for controlled oversize to accommodate plating or standard fit requirements
• Right-hand thread direction; no coolant-through feature

Compatibility

Designed for use in any application requiring a 1-8 UNC 2B class internal thread. Compatible with standard tap wrenches and machine tapping holders sized for a 0.8-inch shank diameter with a 0.6-inch square drive.

Installation Notes

Secure the workpiece fully before tapping and ensure the hole is drilled to the correct tap drill diameter for 1-8 UNC prior to use. Apply appropriate cutting fluid for the workpiece material to reduce heat and extend tool life. Use a tap guide or machine spindle to maintain perpendicularity and prevent tap breakage, especially at the start of the cut. If tapping by hand, back off the tap periodically to break chips and clear the flutes.