Osg 1101503005 Spiral Point Tap 5/16-24 Unf Tin Hss

Product Description

The OSG 1101503005 is a spiral point plug tap designed for cutting 5/16-24 UNF internal threads in a wide range of ferrous and non-ferrous workpiece materials. Built from vanadium high speed steel and finished with a titanium nitride (TiN) coating, this tap delivers improved wear resistance and reduced friction compared to uncoated HSS taps. The plug chamfer style distributes cutting load across several leading threads, making it the standard choice for through-hole tapping. With 3 flutes and a right-hand thread direction, it is suited for general-purpose machine tapping and hand tapping operations performed by machinists and tool-and-die technicians.

This tap is intended for production and maintenance tapping of 5/16-24 UNF through holes across a broad spectrum of materials. The TiN coating and vanadium HSS construction allow it to perform in aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, hardened steel, cast iron, high-nickel alloy, and titanium. It is well suited for job shop, maintenance, repair, and original equipment manufacturing environments where a reliable UNF plug tap is required.

Key Features

• 5/16-24 UNF thread form with right-hand cutting direction and H5 thread limit for close-tolerance fits
• TiN coating extends tool life and reduces built-up edge in steel and aluminum applications
• Vanadium high speed steel substrate provides toughness and heat resistance at cutting speeds typical of production tapping
• Plug chamfer (approximately 3-5 threads) distributes entry load and suits most through-hole applications
• 3-flute geometry promotes chip evacuation and stable tracking in the cut
• No coolant-through requirement simplifies setup on standard tapping heads and CNC machining centers

Compatibility

Designed as a standard replacement or production tap for any application requiring a 5/16-24 UNF plug tap in H5 tolerance; compatible with through-hole tapping on materials including aluminum, carbon steels, alloy steel, stainless steel, cast iron, high-nickel alloy, and titanium.

Installation Notes

Secure the tap in a tapping chuck or rigid holder appropriate for the machine spindle in use; ensure the workpiece is firmly fixtured before starting the cycle. For hand tapping, use a properly sized tap wrench and apply consistent downward pressure through the starting threads to prevent cross-threading. Use a cutting fluid appropriate for the workpiece material to prolong tap life and maintain thread quality. Inspect the tap for chipping or wear after extended runs in harder materials such as stainless steel or titanium.