Osg 1608707 Straight Flute Tap M12x1.75 Metric Coarse

Product Description

The OSG 1608707 is a straight flute tap designed for cutting M12x1.75 metric coarse internal threads in ferrous and non-ferrous workpieces. Built from high-speed steel (HSS) with a nitride/oxide combination coating, this tap resists wear and helps extend service life in production and job-shop environments. It features 4 flutes, a plug chamfer for general-purpose through-hole and blind-hole tapping, and a right-hand thread direction. The 6H class of fit and D6 thread limit make it suitable for standard metric fastener threads. Overall length is 3.375 inches, and thread length is 1.656 inches. Machinists and tool-and-die professionals reach for this tap when threading steel, cast iron, and aluminum components.

The OSG 1608707 is suited for machine tapping and hand tapping applications in manufacturing, maintenance, and repair operations. The plug chamfer style distributes cutting load across several leading threads, making it a practical choice for both through-hole and moderately deep blind-hole applications. The Series 141C designation places this tap in a well-established OSG product family for standard metric threading. Material applications specified by the manufacturer include aluminum and cast iron. The 0.367-inch shank diameter is sized for standard tap holders and collet chucks used in CNC machining centers, drill presses, and tapping machines.

Key Features

• M12x1.75 metric coarse thread profile with 6H class of fit for standard tolerance metric fastener threads
• High-speed steel construction provides toughness and resistance to chipping during interrupted cuts
• Nitride/oxide coating reduces friction and improves wear resistance compared to uncoated HSS
• 4 straight flutes with plug chamfer for general-purpose through-hole and blind-hole tapping
• Right-hand thread direction, D6 thread limit, no coolant-through feature
• Compact 9.3218 mm shank diameter fits standard tap holders and quick-change tooling

Compatibility

Designed as an OEM-style straight flute tap for machine and hand tapping operations requiring M12x1.75 metric coarse threads in aluminum and cast iron workpieces, as specified by the manufacturer for the OSG Series 141C product line.

Installation Notes

This tap is installed by machinists and toolroom professionals using CNC machining centers, drill presses, or manual tapping handles equipped with appropriate tap holders or collet chucks. Always secure the workpiece and ensure the tap is properly aligned with the pilot hole before engaging the cut to prevent tap breakage. Apply cutting fluid appropriate for the workpiece material. When removing a broken or worn tap, de-energize the machine and follow standard lockout/tagout procedures before accessing the spindle or work zone.