Osg 1400114500 Thread Forming Tap 8-32 Unc Cobalt

Product Description

The OSG 1400114500 is a thread forming tap in the HY-PRO NRT series, designed for cold-form tapping of internal threads without chip generation. Sized for 8-32 UNC threads with a modified bottoming chamfer of 2 to 2.5 chamfered threads, this tap is manufactured from cobalt steel with a bright finish. It carries a thread limit of H5 and a Class 2B fit, making it appropriate for precision threading work in blind hole applications. The overall length is 2.125 inches and the shank diameter is 0.168 inches. It is installed by machinists and tool-and-die professionals in production and maintenance environments.

This tap is suited for blind hole threading in a range of ferrous and non-ferrous materials including alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. Its thread forming action displaces material rather than cutting it, producing stronger threads with no chips to clear from the hole. Typical applications include tapping threaded fastener holes in machined components, fixtures, and assemblies where chip evacuation is a concern or where thread strength is a priority. Right-hand thread direction is standard.

Key Features

• Thread forming design eliminates chips, reducing clogging risk in blind holes
• Cobalt steel construction provides heat and wear resistance for tough materials
• Modified bottoming chamfer (2 to 2.5P) allows threading close to the bottom of blind holes
• H5 thread limit and Class 2B fit for consistent, close-tolerance thread production
• Bright finish with no coolant-through requirement simplifies setup
• Right-hand, 8-32 UNC threading suits common fastener specifications

Compatibility

Designed for blind hole thread forming in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P and N apply.

Installation Notes

Thread forming taps require proper lubrication and correct spindle speed for the workpiece material — consult published speeds and feeds for cobalt taps in the target material. The tap must be used with a correctly sized forming tap drill, which is larger than a standard cut-tap drill for the same thread size. Secure the workpiece and ensure the tap is driven straight to avoid thread angle error or tap breakage. Follow shop safety practices and machine guarding requirements when operating tapping equipment.