Osg 1005201108 Straight Flute Tap 7/16-14 Unc Bottoming

Product Description

The OSG 1005201108 is a straight flute bottoming tap designed for cutting 7/16-14 UNC right-hand internal threads in production and maintenance machining applications. Built from powdered metal with a TiCN coating, this tap delivers improved wear resistance and tool life compared to standard high-speed steel. The bottoming chamfer allows threading to the bottom of blind holes where spiral flute or plug taps cannot reach. With 4 flutes and an H5 thread limit, it holds tight tolerances suitable for precision fastener applications. Overall length is 3-5/32 inches with a thread length of 1-7/16 inches. Licensed machinists and toolroom technicians are the primary users.

This tap is suited for machine tapping operations in job shops, production facilities, and maintenance environments. It is engineered for use in aluminum and cast iron workpieces where chip control and surface finish matter. The straight flute geometry is best applied in through-hole or blind-hole applications where chips can be managed manually or with compressed air. Coolant-through capability is not included, so adequate flood or mist coolant delivery from the machine is recommended when tapping cast iron or harder aluminum alloys. The Series 10052 designation places this tap within OSG's standard machine tap line.

Key Features

• Bottoming chamfer for threading to the bottom of blind holes
• Powdered metal construction with TiCN coating for extended tool life
• 4 straight flutes with H5 thread limit for consistent tolerance control
• Right-hand thread direction, 7/16-14 UNC thread form
• Rated for aluminum and cast iron material applications
• No coolant-through design — compatible with external flood or mist coolant setups

Compatibility

Designed for machine tapping of 7/16-14 UNC right-hand threads in aluminum and cast iron workpieces. Fits standard tap holders and quick-change tapping chucks sized for a 0.323-inch shank diameter.

Installation Notes

This tap is intended for use by trained machinists operating drill presses, CNC machining centers, or tapping machines. Always secure the workpiece and ensure the spindle is properly aligned before engaging the tap. Verify correct tap holder torque settings per machine manufacturer guidelines before starting. Inspect the tap for chipping or wear before each use and replace if cutting edges are compromised.