Osg 1206200 Spiral Point Tap 3-56 Unf 2 Flute Hss

Product Description

The OSG 1206200 is a spiral point tap designed for cutting internal threads in a wide range of materials. It produces a 3-56 UNF thread using a plug chamfer entry, which provides gradual engagement and works well for through-hole tapping applications. Manufactured from high-speed steel with a bright finish, this tap operates in a right-hand thread direction and carries an H2 thread limit for consistent fit control. The 2B class of fit makes it suitable for standard commercial and industrial threaded fastener assemblies. With an overall length of 1.813 inches and a thread length of 0.496 inches, it fits standard tap handles and machine tool holders sized for small-diameter taps.

This tap is suited for through-hole applications in both hand-tapping and machine tapping setups. Its spiral point geometry pushes chips forward ahead of the cutting action, reducing chip clogging in through-hole conditions. It is appropriate for use in materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Machinists, tool and die makers, and maintenance technicians working on small fastener assemblies or precision components in the 3-56 UNF thread range will find this tap well-suited to their application.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• High-speed steel construction provides durability across a broad range of workpiece materials
• Plug chamfer for gradual thread engagement and reduced entry force
• H2 thread limit for controlled, consistent 2B class of fit tolerances
• Right-hand thread direction, compatible with standard tap wrenches and machine spindles
• Bright finish with no coolant-through requirement, simplifying setup

Compatibility

Designed as an OEM-style replacement or standard tooling selection for through-hole tapping operations requiring a 3-56 UNF, 2B class of fit thread in aluminum, cast iron, and carbon steel workpieces.

Installation Notes

This tap should be installed in a properly sized tap wrench or machine tap holder before use. Always ensure the workpiece is securely fixtured and the spindle or wrench is aligned with the drilled hole to avoid tap breakage. Apply a suitable cutting fluid for the workpiece material to extend tool life. Power down or de-energize any machine tool before changing or inspecting taps.