Hertel K008002AS Straight Flute Tap 0-80 Unf Bottoming Hss

Product Description

The HERTEL K008002AS is a straight flute bottoming tap designed for cutting internal threads in blind holes where a full thread is required close to the bottom. Manufactured from high-speed steel with a bright, uncoated finish, this tap threads 0-80 UNF holes to a 3B class of fit with an H1 thread limit. The 2-flute straight flute design provides straightforward chip evacuation in through holes and shallow blind holes. With a thread length of 0.3125 inches and an overall length of 1.625 inches, this tap is sized for small-diameter precision work common in instrument, electronics, and tight-tolerance mechanical assemblies. Licensed machinists, toolroom technicians, and precision maintenance mechanics are the primary users.

This tap is suited for threading small fastener holes in ferrous and non-ferrous materials where a 0-80 UNF thread form is required. The bottoming chamfer configuration, typically 1 to 2 threads of lead, is appropriate for blind holes that must be fully threaded as close to the bottom as the tap geometry allows. Typical applications include instrument panel components, small mechanical assemblies, PCB hardware, and precision fixture work. It is sold individually with a minimum order quantity of 1.

Key Features

• 0-80 UNF thread form with 3B class of fit for standard internal thread tolerance
• Bottoming chamfer allows threading to near the base of blind holes
• H1 thread limit for close tolerance control on small diameter threads
• High-speed steel construction provides durability across a wide range of workpiece materials
• Bright, uncoated finish suitable for general-purpose threading applications
• Compact 1.625-inch overall length designed for small-scale precision work

Compatibility

Designed as an OEM-style replacement or standard toolroom tap for any application requiring a 0-80 UNF straight flute bottoming tap with a 3B class of fit and H1 thread limit.

Installation Notes

This tap is installed by machinists and toolroom technicians using a tap handle, tapping head, or CNC rigid tapping setup rated for the 0-80 thread size. Always ensure the tap is properly aligned with the drilled pilot hole before engagement to prevent breakage on this small diameter. Use appropriate cutting fluid for the workpiece material and advance the tap in controlled increments, backing off periodically to break chips. At this diameter, tap breakage is a significant risk if excessive torque or misalignment is present.