Osg 2884401 Spiral Point Tap 2-56 Unc Plug Hss

Product Description

The OSG 2884401 is a spiral point plug tap designed for threading 2-56 UNC holes in light to medium-duty machining applications. Built from high-speed steel with a steam oxide coating, it delivers reliable performance in both manual and machine tapping setups. The 2-flute spiral point geometry pushes chips ahead of the cut, keeping the flutes clear and reducing the risk of chip packing in through-hole applications. At 1.75 inches overall length with a 0.437-inch thread length and a 0.141-inch shank diameter, this tap fits standard tap holders and T-handle wrenches for small-fastener work. The 2B class of fit produces standard commercial tolerances appropriate for most mechanical assemblies.

This tap is suited for threading small-diameter through holes in production and repair environments. Typical applications include instrument panels, electronic enclosures, and light mechanical assemblies where 2-56 UNC fasteners are used. The steam oxide finish provides mild lubricity and corrosion resistance, making it a practical choice for job shop and maintenance work. Right-hand thread direction is standard for conventional 2-56 UNC fastener systems.

Key Features

• Spiral point geometry pushes chips forward — suited for through-hole tapping
• High-speed steel construction for use in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel
• Steam oxide coating adds lubricity and mild corrosion resistance
• 2B class of fit meets standard commercial thread tolerance requirements
• Plug chamfer for starting ease in through-hole applications
• Right-hand thread direction, no coolant-through, non-interrupted thread profile

Compatibility

Designed for tapping 2-56 UNC through holes in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel workpieces. Material application data is sourced directly from OSG Series 287 product specifications.

Installation Notes

This tap should be installed by a machinist or maintenance technician familiar with small-diameter thread cutting. Always secure the workpiece and use appropriate tapping fluid for the material being cut. For machine tapping, ensure the spindle speed and feed rate are appropriate for the 2-56 thread size and material hardness. Inspect the tap for wear or chipping before each use — small-diameter taps are susceptible to breakage if applied with excessive torque or misalignment.