Osg 1635008018 Thread Forming Tap M8x1.00 Metric Fine Cobalt

Product Description

The OSG 1635008018 is a thread forming tap in the EXOPRO XPF Series 16350, designed to produce metric fine internal threads without cutting chips. Made from cobalt high-speed steel with a TiCN coating, it operates in a modified bottoming chamfer configuration with 2.5 to 3 chamfered threads. The 6H class of fit and D8 thread limit deliver precise tolerance control in demanding applications. At 3.54 inches overall length with a 0.47 inch thread length, this tap suits compact workpieces where bottoming reach is required. A licensed machinist or tool-and-die technician is the typical installer.

This tap is suited for blind hole and through-hole threading in a broad range of materials including aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium. Its cold-forming action displaces material rather than removing it, producing stronger threads with no chips to clear. It is appropriate for both production machining environments and precision repair work where M8x1.00 metric fine threads are specified. The right-hand thread direction is standard for conventional CNC and manual tapping operations.

Key Features

• Thread forming (chipless) design produces stronger threads by cold-working the material
• Cobalt HSS construction provides heat and wear resistance in tough alloys and hardened steels
• TiCN coating reduces friction and extends tool life across a wide material range
• Modified bottoming chamfer with 2.5 to 3 chamfered threads for threading close to the bottom of blind holes
• 6H class of fit with D8 thread limit for tight, controlled metric fine tolerances
• Compatible with both blind hole and through-hole threading applications

Compatibility

Designed for M8x1.00 metric fine thread forming in aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium workpieces in blind hole and through-hole configurations.

Installation Notes

Thread forming taps require a properly sized forming tap drill — do not use a standard cut-tap drill size, as the hole diameter is larger and material-specific. Power down or lock out the machine spindle before changing tooling. Apply appropriate tapping fluid or cutting oil for the workpiece material to reduce friction and heat buildup. Follow machine tool manufacturer torque and RPM recommendations for the workpiece material and tap size.