Osg 1405000208 Thread Forming Tap 0-80 Unf Modified Bottoming

Product Description

The OSG 1405000208 is a thread forming tap designed for cold-forming internal threads in blind holes without cutting chips. Built from powdered metal high-speed steel with a TiCN coating, this tap operates in the 0-80 UNF thread size with a modified bottoming chamfer of 2 to 2.5 chamfered threads. The H2 thread limit ensures close tolerance control, making it suitable for precision fastener applications. The modified bottoming chamfer allows threading close to the bottom of blind holes. Machinists, tool-and-die makers, and CNC operators working with tight-tolerance assemblies will find this tap well suited to production and maintenance work.

This tap is intended for blind hole threading in a range of metallic workpiece materials. It performs in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The EXOTAP VP-NRT series designation indicates it is engineered for form tapping where chip-free threading is required, making it appropriate for applications where chip evacuation is difficult or where thread strength must be maximized. Right-hand thread direction applies.

Key Features

• Thread forming design creates threads without chips, reducing breakage risk in blind holes
• Powdered metal high-speed steel construction for improved wear resistance over standard HSS
• TiCN coating reduces friction and extends tool life across a range of workpiece materials
• Modified bottoming chamfer with 2 to 2.5 chamfered threads for threading close to hole bottom
• H2 thread limit for tight tolerance class 3B fit control
• Compatible with alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring a 0-80 UNF right-hand thread with a class 3B fit.

Installation Notes

Thread forming taps require adequate lubrication or cutting fluid matched to the workpiece material to prevent galling and tap breakage. Power down and secure the workpiece and spindle before tap changes. Use a torque-controlled tapping attachment or CNC rigid tapping cycle to avoid overloading the tap at this small diameter. Verify hole depth and pilot hole diameter against UNF form-tap recommendations before starting the threading cycle.