Osg 1208400 Spiral Point Tap 10-24 Unc 2 Flute Hss

Product Description

The OSG 1208400 is a spiral point plug tap designed for cutting 10-24 UNC threads in through-hole applications. Manufactured from high-speed steel with a bright finish, this tap features a 2-flute, right-hand spiral point geometry that pushes chips forward ahead of the cutting zone, keeping flutes clear during production drilling. The overall length is 2.375 inches with a thread length of 0.875 inches and a shank diameter of 0.194 inches. Built to H2 thread limit tolerance, it produces accurate, consistent threads in a wide range of ferrous and non-ferrous materials. Machinists, tool-and-die makers, and maintenance technicians rely on this tap for reliable performance in manual and CNC tapping operations.

This tap is suited for through-hole tapping in both light production and job-shop environments. The plug chamfer style - typically 3 to 5 thread lead - makes it the standard choice for through-holes where chip evacuation is straightforward. Compatible material applications include aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel, making it a versatile option across fabrication, maintenance, and repair work.

Key Features

• Spiral point geometry pushes chips forward for clear, uninterrupted cutting in through-hole applications
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• H2 thread limit ensures consistent, close-tolerance 10-24 UNC threads
• Bright finish - no coating - suitable for use with standard tapping fluids and cutting oils
• Right-hand thread direction, plug chamfer; no coolant-through requirement
• Compact overall length of 2.375 inches fits standard tap holders and CNC tooling

Compatibility

Designed for through-hole tapping of 10-24 UNC threads; compatible with aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces. Fits standard straight-shank tap holders sized for a 0.194-inch shank diameter.

Installation Notes

Tapping operations should be performed by a qualified machinist following standard shop safety practices. Ensure the workpiece is securely fixtured and the tap is properly aligned to the drilled pilot hole before engagement. Apply an appropriate cutting fluid or tapping oil for the workpiece material to extend tap life and improve thread quality. For CNC applications, verify spindle speed and feed rate are set to the tap manufacturer recommendations for the specific material being tapped.