Osg 2886500 Spiral Point Tap 5-40 Unc 2 Flutes Hss

Product Description

The OSG 2886500 is a spiral point tap designed for cutting 5-40 UNC internal threads in through-hole applications. Also called a gun tap, the spiral point geometry pushes chips forward ahead of the cutting action, reducing chip packing and improving thread quality in production environments. Built from high-speed steel with a bright finish, this tap features a plug chamfer for guided entry and 2 flutes sized for the 5-40 thread form. The 2B class of fit designation makes it suitable for standard unified inch thread tolerances. It is installed by licensed machinists and tooling technicians working on precision assemblies, light industrial components, and fastener-driven fabrication work.

The OSG 2886500 is suited for through-hole tapping in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. The plug chamfer style provides gradual thread engagement, making it a practical choice for production tapping on CNC machining centers, drill presses, and tapping machines. Right-hand thread direction aligns with standard fastener orientation. The 5-40 UNC thread size is common in small hardware, instrument panels, and electronic enclosures where compact fastening is required.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole tapping
• 5-40 UNC thread form with 2B class of fit for standard unified inch tolerance
• Plug chamfer provides gradual thread engagement and guided entry
• High-speed steel construction for durability across aluminum and low-to-medium carbon steel
• Bright finish with no coolant-through requirement simplifies setup
• Right-hand thread direction, compatible with standard tapping chucks and holders

Compatibility

Designed for through-hole tapping in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel workpieces requiring a 5-40 UNC 2B thread. Compatible with standard tapping chucks and holders sized for a 0.141-inch shank diameter.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Secure the tap in a properly sized chuck or holder before operation and confirm workpiece is rigidly fixtured to prevent deflection. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality. Spiral point taps are designed for through-holes only and should not be used in blind-hole applications where chip evacuation is restricted.