Osg 2948601 Spiral Flute Tap 9/16-12 Unc Vanadium Hss

Product Description

The OSG 2948601 is a spiral flute tap designed for cutting 9/16-12 UNC right-hand internal threads in a wide range of ferrous materials. Built from 3% vanadium high-speed steel and finished with a steam oxide coating, this tap delivers durability and chip evacuation performance in demanding tapping operations. The modified bottoming chamfer allows threading close to the bottom of blind holes. With a 45-degree helix angle and 4 right-hand spiral flutes, it pulls chips up and out of the hole efficiently, reducing the risk of chip packing. Overall length is 3-19/32 inches. This tool is intended for use by machinists and toolroom professionals in production and maintenance environments.

The OSG 2948601 is suited for tapping operations in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel. The modified bottoming chamfer makes it appropriate for blind-hole applications where full thread depth near the bottom of the bore is required. The spiral flute geometry and steam oxide finish make it a reliable choice for both CNC machine tapping and hand-tapping setups where chip control is a priority.

Key Features

• 4 right-hand spiral flutes with 45-degree helix angle for efficient upward chip evacuation
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 3% vanadium high-speed steel construction for increased wear resistance
• Steam oxide coating reduces friction and improves lubrication retention
• Thread limit H3 for standard tolerance applications
• Right-hand thread direction, 9/16-12 UNC specification

Compatibility

Designed for cutting 9/16-12 UNC right-hand threads in alloy steel, carbon steel, cast iron, stainless steel, die steel, and hardened steel workpieces. Part of the OSG Series 290 spiral flute tap line.

Installation Notes

Tapping operations should be performed by qualified machinists following standard toolroom safety practices. Ensure the workpiece is properly secured and the spindle is aligned with the hole axis before beginning the cut. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. When using in a CNC environment, verify spindle speed and feed rate against the tap manufacturer recommendations for the material being cut.