Heli-coil 06CBB Hand Sti Tap 6-32 Unc H2 Bottoming

Product Description

The HELI-COIL 06CBB is a hand STI (Screw Thread Insert) tap designed to cut the oversized internal threads required before installing a Heli-Coil wire thread insert. This 6-32 UNC tap features a bottoming chamfer, which allows it to thread close to the bottom of a blind hole. It carries a H2 thread limit for controlled tolerance and is ground from high-speed steel for durability in production and repair applications. With 3 flutes and a bright uncoated finish, the 06CBB suits hand-tapping operations where a clean, accurate thread form is critical before insert installation. Licensed technicians and machinists use this tap during thread repair on stripped or damaged fastener holes.

The 06CBB is used in residential and commercial maintenance, manufacturing, and field repair scenarios where stripped 6-32 UNC threads need to be restored using a wire thread insert system. The bottoming chamfer design makes it especially practical in blind-hole applications where full thread engagement near the base of the hole is required. It is appropriate for use in metal components found in HVAC equipment, electrical panels, plumbing fixtures, and general mechanical assemblies.

Key Features

• Bottoming chamfer for threading close to the base of blind holes
• H2 thread limit for tight tolerance control on 6-32 UNC threads
• 3-flute geometry for efficient chip clearance during hand tapping
• High-speed steel construction for wear resistance across ferrous and non-ferrous materials
• Bright uncoated finish - no coating buildup that could affect thread tolerance
• Class of fit 3B for precise mating with standard 6-32 UNC fasteners after insert installation

Compatibility

Designed for use in Heli-Coil STI thread insert systems requiring a 6-32 UNC oversized tap with a bottoming chamfer profile.

Installation Notes

Installation is performed by hand-tap tooling; use a standard tap handle sized for the shank diameter. Always ensure the workpiece is secured before tapping and apply appropriate cutting fluid to extend tap life and improve thread quality. Power down any equipment and relieve all system pressure or tension before performing thread repair on installed components. Follow applicable shop safety and applicable trade codes when performing thread repair in the field.