Osg 1405004708 Thread Forming Tap 8-32 Unc Modified Bottoming

Product Description

The OSG 1405004708 is a thread forming tap designed for 8-32 UNC blind hole threading applications. Unlike cutting taps, this forming tap displaces material rather than removing it, producing stronger, work-hardened threads with no chips to clear. Built from powdered metal high-speed steel (PM-HSS) for superior wear resistance and toughness, and finished with a TiCN coating to reduce friction and extend tool life. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows threading close to the bottom of a blind hole. Overall length is 2.125 inches with a shank diameter of 0.168 inches. Part of the OSG EXOTAP VP-NRT series.

This tap is suited for production and maintenance threading in metalworking environments. The H6 thread limit makes it appropriate for close-tolerance 8-32 UNC fits. It is rated for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Machinists, tool and die makers, and maintenance technicians working on blind-hole applications in tapping machines or hand tap drivers will find this a direct fit for precision threading tasks.

Key Features

• Thread forming (chipless) design produces stronger threads and eliminates chip evacuation concerns in blind holes
• Powdered metal high-speed steel construction delivers superior hardness and wear resistance over conventional HSS
• TiCN coating reduces friction and heat buildup, extending tap life in abrasive materials
• Modified bottoming chamfer (2 to 2.5P) allows threading close to the bottom of a blind hole
• H6 thread limit ensures close-tolerance 8-32 UNC thread production
• Right-hand thread direction; compatible with standard tapping equipment and hand drivers

Compatibility

Designed for 8-32 UNC blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Part of the OSG EXOTAP VP-NRT series (Series 14050).

Installation Notes

Thread forming taps require adequate lubrication or cutting fluid matched to the workpiece material - consult material-specific tapping fluid recommendations before use. Ensure the tap is driven at the correct RPM for the material and tap size to avoid galling or tap breakage. Secure the workpiece firmly and align the tap perpendicular to the hole before beginning to avoid cross-threading. Coolant-through capability is not available on this tap, so external lubrication is required.