Osg 1625514226 Thread Forming Tap 1/4-20 Unc 2B H6

Product Description

The OSG 1625514226 is a thread forming tap designed for cutting 1/4-20 UNC internal threads in a wide range of metal workpieces. Unlike cutting taps, thread forming taps displace material rather than remove chips, producing stronger threads with a smoother finish. This tap features a semi-bottoming chamfer, allowing it to thread close to the bottom of a blind hole. Built from cobalt high speed steel with a V-coating finish, it delivers extended tool life in demanding production and maintenance machining environments. Machinists and tool-and-die technicians are the primary users of this tap in shop, field, and manufacturing settings.

This tap is suited for threading aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, hardened steel, high-nickel alloys, and titanium. The semi-bottoming chamfer makes it appropriate for blind-hole applications where thread depth close to the bottom is required. With a thread length of 0.526 inches (15 mm), an overall length of 3.937 inches (100 mm), and a right-hand thread direction, this tap fits standard machine tapping setups and manual tap handles with the correct square drive size.

Key Features

• Thread forming (chipless) design produces stronger, work-hardened threads with no chip evacuation required
• Cobalt high speed steel construction for heat and wear resistance in tough alloys and stainless steel
• Semi-bottoming chamfer for threading close to the base of blind holes
• V-coating finish reduces friction and extends tool life across a broad range of workpiece materials
• H6 thread limit for precise tolerance control on 1/4-20 UNC 2B Class of Fit threads
• Right-hand thread direction compatible with standard tapping machines and tap wrenches

Compatibility

Designed for use in applications requiring 1/4-20 UNC internal threads with a 2B Class of Fit. Compatible workpiece materials include aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, hardened steel, high-nickel alloys, and titanium as specified by the manufacturer.

Installation Notes

This tap is installed by machinists and tooling professionals using standard tapping machines or manual tap wrenches sized to the 0.191-inch square drive. Ensure the workpiece is securely fixtured and the correct tapping fluid or cutting oil is applied for the specific workpiece material before beginning the tapping operation. For machine tapping, verify spindle speed is appropriate for the workpiece material and tap size. Inspect the tap for wear or damage before each use and replace if thread quality deteriorates.