Osg 1400120301 Thread Forming Tap 10-32 Unf Cobalt

Product Description

The OSG 1400120301 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 with a steam oxide coating, this tap handles 10-32 UNF threads in a modified bottoming chamfer configuration with 2 to 2.5 chamfered threads. The H3 thread limit and Class 3B fit make it suitable for precision threading applications where tight tolerances are required. It is installed by machinists, maintenance mechanics, and tool-and-die technicians working with blind hole applications across a range of ferrous and non-ferrous base materials.

This tap is rated for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel, making it a versatile choice for blind hole threading in production and repair environments. The modified bottoming chamfer allows threading close to the bottom of a blind hole while still providing enough lead-in for controlled forming. It fits standard tapping chucks and holders compatible with a 0.194-inch shank diameter and a 0.152-inch square drive size.

Key Features

• Thread forming (chipless) design eliminates chip evacuation concerns in blind holes
• Cobalt construction provides heat and wear resistance for harder materials including stainless and hardened steel
• Steam oxide coating reduces friction and improves lubrication retention during tapping
• Modified bottoming chamfer threads close to the bottom of blind holes with 2 to 2.5 thread lead-in
• H3 thread limit with Class 3B fit for consistent, tolerance-controlled thread forming
• Right-hand thread direction, compatible with standard tapping setups

Compatibility

Designed for blind hole thread forming in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Compatible with standard tapping chucks and holders accepting a 0.194-inch shank diameter.

Installation Notes

Thread forming taps require proper cutting fluid or tapping compound appropriate to the workpiece material — always use lubrication recommended for the specific base metal being tapped. Ensure the workpiece is securely fixtured and the tap is correctly aligned to avoid tap breakage, particularly in harder materials. Power down and de-energize any CNC or tapping machine before changing tooling. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection.