Osg 1202800 Spiral Point Tap 8-32 Unc 2 Flute Hss

Product Description

The OSG 1202800 is a spiral point tap designed for cutting right-hand internal threads to the 8-32 UNC standard. Built from high-speed steel with a bright finish, it features a plug chamfer and two flutes arranged in a spiral point geometry that pushes chips forward ahead of the cutting action. This design makes it well-suited for through-hole tapping operations where chip evacuation into the hole is acceptable. The H1 thread limit holds tight tolerance control on the finished thread. Overall length is 2.125 inches with a thread length of 0.39 inches and a shank diameter of 0.168 inches. Machinists, tool and die techs, and maintenance professionals are the primary users.

The OSG 1202800 is appropriate for through-hole tapping in a wide range of materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Its spiral point geometry and plug chamfer make it a practical choice for production and maintenance tapping on drill presses, CNC machining centers, and hand-operated tapping machines where chip control and thread accuracy are both priorities.

Key Features

• 8-32 UNC thread standard, right-hand thread direction
• Plug chamfer for gradual thread engagement and reduced starting force
• Spiral point geometry pushes chips forward in through-hole applications
• H1 thread limit for consistent, close-tolerance thread production
• High-speed steel construction with bright finish — no coating to add dimensional uncertainty
• Coolant-through: No — suitable for conventional flood or dry tapping setups

Compatibility

Designed as an OEM-style cutting tool replacement for 8-32 UNC through-hole tapping applications across compatible tap holders and chucks accepting a 0.168-inch shank diameter.

Installation Notes

Installation and use of this tap should be performed by qualified machinists or maintenance technicians familiar with tapping operations. Always ensure the workpiece is securely fixtured and the spindle or tap handle is properly aligned before engagement to prevent tap breakage. Use an appropriate cutting fluid for the workpiece material, particularly when tapping cast iron or hardened steel. Inspect the tap for wear or chipping before each use and replace if thread quality or torque resistance indicates degradation.