Osg 1400118405 Thread Forming Tap 10-24 Unc Cobalt Tin

Product Description

The OSG 1400118405 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting chips. Built from cobalt high-speed steel and finished with a titanium nitride (TiN) coating, it handles demanding threading applications in alloy steel, carbon steel, stainless steel, hardened steel, die steel, and aluminum. The modified bottoming chamfer — with 2 to 2.5 chamfered threads — allows the tap to thread close to the bottom of a blind hole. Thread limit is H5, providing tight tolerance control for 10-24 UNC threads. Licensed machinists and tool-and-die tradespeople are the primary users of this tap.

This tap is suited for blind hole threading operations on the shop floor or in the field where chip evacuation is a concern. Because thread forming displaces material rather than cutting it, the process produces stronger thread forms and eliminates the need to clear chips from the bore. It is appropriate for both production runs and precision one-off threading tasks in materials coded P and N per the HY-PRO NRT classification system.

Key Features

• Thread forming design cold-forms threads without producing chips, ideal for blind hole applications
• Cobalt high-speed steel construction provides heat and wear resistance in tough materials
• TiN coating extends tool life and reduces friction during forming
• Modified bottoming chamfer (2 to 2.5 threads) allows threading close to the bottom of a blind hole
• H5 thread limit for consistent, tight-tolerance 10-24 UNC thread production
• Right-hand thread direction, compatible with standard tapping equipment

Compatibility

Designed for threading alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces with 10-24 UNC blind hole requirements. Part of the OSG HY-PRO NRT series (Series 14001).

Installation Notes

Thread forming taps require the correct pilot hole diameter — use the forming tap drill chart for 10-24 UNC to select the proper drill size, as it differs from a cutting tap drill size. Apply appropriate tapping fluid for the workpiece material before forming. Secure the workpiece and use a calibrated torque driver or CNC tapping cycle to avoid tap breakage, particularly near the bottom of the blind hole. Always follow shop safety protocols and machine-specific operating procedures when tapping.