Osg 1652501308 Spiral Flute Tap Unf 10-32 2 Flute

Product Description

The OSG 1652501308 is a spiral flute tap designed for cutting internal UNF threads in a wide range of ferrous and non-ferrous materials. Built to a 10-32 thread size with a 45-degree helix angle and two right-hand flutes, this tap channels chips up and out of the hole during drilling operations, making it well suited for blind-hole and semi-bottoming applications. The powdered metal construction with a V finish provides durability and wear resistance across demanding production environments. It carries an H3 thread limit and a 2B class of fit, consistent with standard UNF fastener tolerances. Licensed machinists and tooling technicians install this tap in manual or CNC tapping operations.

This tap is intended for use in materials including alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel. The semi-bottoming chamfer allows threading close to the bottom of a blind hole while still providing enough lead-in for reliable thread formation. With an overall length of 5.96 inches and a tapping depth of 27.00 mm, it fits standard tapping heads and CNC tool holders for both short-run and production work.

Key Features

• 10-32 UNF thread size with 2B class of fit and H3 thread limit for standard fastener compatibility
• 45-degree helix angle with right-hand spiral flutes for efficient chip evacuation in blind holes
• Semi-bottoming chamfer for threading close to the bottom of a blind hole
• Powdered metal construction with V finish for wear resistance across steel, cast iron, and aluminum workpieces
• Right-hand thread direction, no coolant-through requirement, suitable for manual and CNC tapping setups
• Series 16525 OSG tooling for consistent dimensional standards across the product line

Compatibility

Designed as an OEM-style replacement or direct tooling selection for 10-32 UNF tapping applications in alloy steel, aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, medium-carbon steel, and stainless steel workpieces.

Installation Notes

Installation is performed by machinists or tooling technicians using standard tap holders compatible with the 0.194-inch shank diameter and 0.152-inch square drive. Ensure the workpiece is securely fixtured and the tap is properly aligned before initiating the cut to prevent tap breakage. Apply appropriate cutting fluid for the workpiece material. Follow applicable shop safety procedures and machine manufacturer guidelines when setting spindle speed and feed rate for tapping operations.