Osg 1410100900 Thread Forming Tap M2.5x0.45 Cobalt

Product Description

The OSG 1410100900 is a bottoming-style thread forming tap designed for M2.5x0.45 Metric Coarse applications. Unlike cutting taps, thread forming taps displace material rather than remove chips, producing stronger, work-hardened threads with no swarf to clear from the hole. Built from cobalt high-speed steel with a bright finish, this tap handles the elevated heat and stress of forming threads in a range of ferrous and non-ferrous materials. With an overall length of 1.813 inches and a thread length of 0.512 inches, it is sized for compact, precision fastener applications in production and repair environments. It is part of the OSG HY-PRO NRT series, engineered for consistent thread quality in blind hole applications.

This tap is suited for blind hole threading in residential, commercial, and industrial machining and assembly work. The bottoming chamfer, with 1 to 1.5 chamfered threads, allows threading close to the bottom of a blind hole, making it the correct choice when thread engagement depth is critical. Typical applications include tapping M2.5 holes in precision components, fixtures, and assemblies made from alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Machinists, tool and die makers, and maintenance technicians working with small-diameter metric fasteners will find this tap appropriate for both CNC and hand-tapping setups.

Key Features

• Thread forming design displaces material for chip-free, stronger threads in blind holes
• Bottoming chamfer with 1 to 1.5 chamfered threads for maximum thread depth in blind holes
• Cobalt construction provides heat and wear resistance in tough ferrous and stainless materials
• Bright finish suitable for use across a broad range of compatible materials
• Class of fit 6H with D5 thread limit for consistent, accurate metric thread production
• Right-hand thread direction, no coolant-through requirement for simplified setups

Compatibility

Designed for M2.5x0.45 Metric Coarse blind hole threading 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 a specific forming tap drill size, which is larger than the drill size used for cutting taps of the same thread — confirm the correct forming drill diameter before starting. Secure the workpiece and ensure the tap is properly aligned to avoid cross-threading or tap breakage, especially critical at this small diameter. Apply a suitable tapping fluid or cutting oil for the workpiece material to reduce forming force and extend tap life. Follow applicable shop safety procedures and machine guarding standards when power-tapping.