Osg 1400153601 Thread Forming Tap 3/4-10 Unc Cobalt H7

Product Description

The OSG 1400153601 is a thread forming tap in the HY-PRO NRT series, designed for cold-forming internal threads without cutting or producing chips. Built from cobalt high-speed steel and finished with a steam oxide coating, it handles demanding materials including alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The modified bottoming chamfer — with 2 to 2.5 chamfered threads — allows threading close to the bottom of blind holes. The H7 thread limit designation provides a tighter tolerance range suited to precision threading applications. This tap is installed by machinists and maintenance technicians working with CNC or manual tapping equipment.

This tap is rated for blind hole threading in a broad range of ferrous and non-ferrous materials. Its 3/4-10 UNC thread form and right-hand thread direction make it a standard choice for structural and mechanical assembly applications across manufacturing, tooling, and maintenance operations. The cobalt construction supports use in tougher workpiece materials where standard high-speed steel taps lose cutting life prematurely.

Key Features

• Thread forming (chipless) design eliminates chip evacuation concerns in blind holes
• Cobalt high-speed steel construction for extended tool life in hard and abrasive materials
• Steam oxide coating reduces friction and improves lubrication retention during tapping
• Modified bottoming chamfer (2 to 2.5P) for threading close to hole bottoms
• H7 thread limit for controlled tolerance fit in precision applications
• Right-hand, 3/4-10 UNC thread form for standard fastener compatibility

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 adequate lubrication — use a cutting fluid or tapping compound appropriate for the workpiece material before starting. Ensure the drilled hole diameter matches the recommended forming tap drill size for 3/4-10 UNC to achieve proper thread form and avoid tap breakage. Secure the workpiece firmly and align the tap perpendicular to the hole before applying torque. Power down or de-energize any automated equipment before changing or inspecting taps.