Osg 1060100 Straight Flute Tap 2-56 Unc Plug Hss

Product Description

The OSG 1060100 is a straight flute tap designed to cut 2-56 UNC internal threads in a range of ferrous and non-ferrous metals. It features a plug chamfer, 2-flute geometry, and a bright uncoated high-speed steel construction. The tap runs right-hand thread direction with a Thread Limit of H1, producing a 2B class of fit suitable for standard fastener assemblies. With an overall length of 1.75 inches and a thread length of 0.47 inches, this tap is sized for small-diameter threading work common in precision machining, instrument assembly, and light mechanical fabrication. It is installed by machinists and tool-and-die professionals using a tap wrench or machine tapping setup.

This tap is suited for threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer style makes it appropriate for through-hole tapping and for starting threads in blind holes where adequate chip clearance is maintained. The 2-flute design keeps the tool profile compact, which is useful when working with the small 0.141-inch shank diameter typical of number-2 taps. It fits standard tap chucks and collet holders sized for small-diameter tooling.

Key Features

• 2-56 UNC thread form, 56 threads per inch, right-hand direction
• Plug chamfer for through-hole and entry-point threading
• High-speed steel construction with bright uncoated finish
• H1 thread limit for 2B class of fit tolerances
• 2-flute geometry suited for small-diameter tapping in multiple metals
• Compact 1.75-inch overall length fits standard small-tap holders

Compatibility

Designed as a standard replacement or production tap for 2-56 UNC threading applications in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces.

Installation Notes

Tapping operations with small-diameter taps should be performed by qualified machinists using proper speed and feed settings to avoid tap breakage. Always ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before engagement. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. When hand tapping, back off periodically to break chips and prevent binding.