Osg 1101515605 Spiral Point Tap 4-48 Unf 3 Flute Tin

Product Description

The OSG 1101515605 is a spiral point tap designed for through-hole threading in 4-48 UNF applications. It features a plug chamfer for progressive thread engagement and a titanium nitride (TiN) coating over a vanadium high speed steel (HSS-E-PM) body. The 3-flute spiral point geometry pushes chips forward ahead of the tap, reducing clogging in through-hole operations. At 1.87 inches overall length with a 0.14 inch shank diameter, this tap is suited to precision threading work in small-diameter fastener applications. Installation requires a tapping machine, hand tap wrench, or CNC rigid tapping cycle with appropriate feed rate for 48 threads per inch pitch.

This tap is intended for through-hole threading across a range of materials including steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. The TiN coating extends tool life in abrasive and work-hardening materials. Typical applications include production threading of small fastener holes in machined components, fabrication, and repair environments. It carries an H3 thread limit, indicating a tolerance class appropriate for standard fit threaded assemblies requiring controlled oversize for plated or coated fasteners.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole threading
• TiN coating improves wear resistance and tool life in hard and abrasive materials
• Vanadium HSS-E-PM body provides toughness in interrupted and difficult-to-machine materials
• H3 thread limit for controlled tolerance fit in standard threaded assemblies
• Right-hand thread direction, 3 flutes, plug chamfer for progressive engagement
• No coolant-through requirement simplifies setup in manual and CNC applications

Compatibility

Designed for through-hole threading of 4-48 UNF threads in steel, stainless steel, cast iron, non-ferrous metals, superalloys, titanium, and hard materials. Suitable for use in tapping machines, CNC machining centers, and hand tapping setups configured for right-hand 4-48 UNF thread production.

Installation Notes

This tap should be installed and operated by a qualified machinist or tooling technician familiar with tapping operations and cutting tool safety. Ensure the workpiece is securely fixtured and that the spindle or tap wrench is properly aligned before engaging the tap. Apply appropriate cutting fluid or tapping compound for the workpiece material to reduce friction and extend tool life. For CNC rigid tapping, verify spindle feed rate matches the 48 threads per inch pitch before cycle execution.