Osg 1415004408 Thread Forming Tap M12x1.75 Metric Coarse

Product Description

The OSG 1415004408 is a thread forming tap designed for M12x1.75 metric coarse threading in blind hole applications. Part of the EXOTAP VP-NRT series, it uses a cold-forming method that displaces material rather than cutting it, producing stronger threads with no chips to clear. The tap is manufactured from powdered metal high-speed steel (PM-HSS) and carries a TiCN coating for improved wear resistance and lubricity under load. With a modified bottoming chamfer of 2 to 2.5 threads, it is suited for threading close to the bottom of a blind hole. Licensed machinists and tool-and-die technicians are the primary installers in production and maintenance environments.

This tap is rated for use in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. Its thread limit is D6 with a class of fit of 3B, making it appropriate for standard metric fastener fits in precision assemblies. The modified bottoming chamfer allows threading deeper into blind holes where a standard plug or spiral point tap cannot reach. It is commonly used in automotive, aerospace, and general metalworking applications where thread integrity and surface finish are critical.

Key Features

• Thread forming design displaces material without cutting, producing chip-free blind hole threads
• Powdered metal high-speed steel construction provides consistent grain structure and extended tool life
• TiCN coating reduces friction and improves wear resistance across a wide range of workpiece materials
• Modified bottoming chamfer (2 to 2.5P) enables threading to near-bottom depth in blind holes
• D6 thread limit and 3B class of fit for standard metric tolerance control
• Right-hand thread direction, compatible with standard tapping spindles and CNC tapping heads

Compatibility

Designed for 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, intended for use with standard M12x1.75 metric coarse thread specifications.

Installation Notes

This tap should be installed and operated by a qualified machinist familiar with thread forming tool requirements. Adequate tapping fluid or cutting oil must be applied to the workpiece before tapping to reduce heat and extend tool life. Ensure the spindle speed and feed rate are set per the tap manufacturer guidelines for the specific workpiece material before beginning the operation. Inspect the tap for wear or chipping before each use and replace if thread form shows signs of degradation.