Osg 2817901 Spiral Point Tap 8-32 Unc 3 Flute Plug

Product Description

The OSG 2817901 is a spiral point plug tap designed for threading through-holes in a wide range of ferrous and non-ferrous materials. Built from Vanadium High Speed Steel (HSS-E) with a steam oxide coating, this tap handles the rigors of production and maintenance tapping operations. It cuts an 8-32 UNC right-hand thread, runs three flutes, and carries a H6 thread limit for consistent fit across standard inch-series fastener applications. The overall length is 2.126 inches with a thread length of 0.374 inches and a shank diameter of 0.168 inches. The spiral point geometry pushes chips forward ahead of the cut, making it well suited for tapping through-holes where chip evacuation matters. Licensed machinists, tool-and-die makers, HVAC fabricators, and plumbing technicians all reach for this style of tap in daily production work.

This tap is appropriate for threading 8-32 UNC through-holes in residential and commercial fabrication, maintenance, and repair settings. The H6 thread limit targets general-purpose fits where standard tolerances are acceptable. Rated material applications include aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, hardened steel, stainless steel, and cast iron, making it a versatile choice across sheet metal, structural, and mechanical assembly work. It does not support coolant-through delivery and is not designed for interrupted threads.

Key Features

• Spiral point geometry pushes chips forward, optimizing performance in through-hole applications
• Vanadium High Speed Steel (HSS-E) construction provides elevated heat and wear resistance over standard HSS
• Steam oxide coating reduces friction and provides a degree of corrosion resistance during storage and use
• H6 thread limit delivers consistent 8-32 UNC tolerance for general-purpose fastener fits
• Right-hand cut, three-flute design compatible with standard tapping attachments and tap handles
• No coolant-through requirement simplifies use in manual and standard CNC tapping operations

Compatibility

Designed as an OEM-style replacement and standard production tap for 8-32 UNC through-hole threading operations across a broad range of machine tools, tapping attachments, and hand tap handles that accept straight-shank taps of 0.168-inch shank diameter.

Installation Notes

This tap should be installed by a qualified machinist or trade professional familiar with tapping speeds, feeds, and proper tap wrench or machine setup. Always ensure the workpiece is securely clamped and the starting hole is drilled to the correct tap drill diameter for 8-32 UNC before beginning the tapping operation. Use an appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Do not reverse the tap too aggressively when breaking chips, as this can cause breakage in harder materials.