Osg 1101502905 Spiral Point Tap 5/16-24 Unf Tin Hss

Product Description

The OSG 1101502905 is a spiral point plug tap designed for threading 5/16-24 UNF right-hand internal threads in a wide range of ferrous and non-ferrous materials. Manufactured from vanadium high speed steel with a titanium nitride (TiN) coating, this tap combines edge retention with reduced friction to extend tool life in production environments. The three-flute spiral point geometry pushes chips forward ahead of the cut, making it well suited for through-hole tapping operations. It is rated to a 3B class of fit with an H3 thread limit, ensuring consistent, tolerance-critical threads.

This tap is intended for use in machining, maintenance, and fabrication settings where through-hole tapping of 5/16-24 UNF threads is required. The TiN coating improves performance in materials including 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 typically used in manual tapping, CNC machining centers, and drill press tapping fixtures by machinists and maintenance technicians.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• TiN coating reduces friction and improves tool life across a broad material range
• Vanadium high speed steel construction for heat and wear resistance
• 3B class of fit with H3 thread limit for precise, repeatable thread tolerances
• Plug chamfer provides a balance of starting ease and thread engagement
• Right-hand thread direction, no coolant-through, non-interrupted thread form

Compatibility

Designed for through-hole tapping of 5/16-24 UNF threads. Suitable for use in aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, cast iron, high-nickel alloy, and titanium per OSG Series 11015 specifications.

Installation Notes

This tap should be installed in a tap wrench, tapping head, or CNC toolholder appropriate for the shank diameter before use. Always apply cutting fluid or tapping compound matched to the workpiece material to reduce heat buildup and extend tool life. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before beginning the cut. Inspect the tap for chipping or wear before each use and replace if thread quality degrades.