Osg 1101501005 Spiral Point Tap 8-32 Unc Tin Hss

Product Description

The OSG 1101501005 is a spiral point plug tap designed for threading 8-32 UNC holes in a wide range of metals. It features 3 flutes, a plug chamfer, and is manufactured from vanadium high-speed steel with a TiN (titanium nitride) coating. The TiN coating reduces friction and extends tool life compared to uncoated HSS taps. At 2.125 inches overall length with a 0.437-inch thread length and 0.168-inch shank diameter, this tap fits standard tap holders and hand tappers used by machinists, maintenance technicians, and production shops. The H4 thread limit designation ensures consistent fit for standard UNC tolerance requirements.

This tap is suited for through-hole threading operations in production and maintenance environments. The spiral point geometry pushes chips forward ahead of the cutting zone, making it most effective in through-hole applications. It covers a broad material application range including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, stainless steel, hardened steel, die steel, cast iron, high-nickel alloy, and titanium. Right-hand thread direction is standard for conventional UNC fastener applications.

Key Features

• 8-32 UNC thread size with H4 thread limit for standard tolerance fits
• 3-flute spiral point geometry pushes chips forward - optimized for through-hole tapping
• TiN coating reduces friction and extends cutting life over uncoated HSS
• Vanadium high-speed steel construction handles a wide range of metals including stainless and titanium
• Plug chamfer provides a gradual lead-in for general-purpose tapping
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed as an OEM-style replacement and general-purpose spiral point tap compatible with standard 8-32 UNC through-hole threading applications across the material types listed in specifications.

Installation Notes

This tap is installed by machinists and maintenance technicians using standard tap wrenches, hand tappers, or CNC tap holders. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for 8-32 UNC before tapping. Apply appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Do not force the tap if resistance increases unexpectedly - back off to clear chips before continuing.