Osg 1004300 Straight Flute Tap 8-32 Unc Plug Hss

Product Description

The OSG 1004300 is a straight flute plug tap designed for threading 8-32 UNC holes in a wide range of ferrous and non-ferrous materials. It features 4 flutes and a plug chamfer, which provides a gradual lead-in that works well for through-hole tapping applications. Manufactured from high-speed steel with a bright, uncoated finish, the tap has an overall length of 2.125 inches and a thread length of 0.47 inches. The H1 thread limit ensures close tolerance control, making this tap suitable for standard 8-32 UNC thread production in general machining, maintenance, and repair environments.

This tap is intended for use in machine-shop and industrial maintenance settings where 8-32 UNC threads are required. Its straight flute geometry is well suited for tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer style makes it appropriate for through-hole applications or for starting a thread before finishing with a bottoming tap. It is sized for use with standard tapping chucks, CNC machines, or hand-tapping operations.

Key Features

• 8-32 UNC thread form with right-hand thread direction
• 4-flute straight flute design for through-hole tapping
• Plug chamfer for gradual thread engagement
• H1 thread limit for close tolerance control
• High-speed steel construction for durability across a range of workpiece materials
• Bright, uncoated finish - no coolant-through requirement

Compatibility

Designed for tapping 8-32 UNC threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Fits standard tap holders and tapping chucks sized for the 0.168-inch shank diameter common to this tap class.

Installation Notes

This tap should be installed and operated by a qualified machinist or maintenance technician familiar with threading operations. Ensure the workpiece is securely fixtured and the correct tap drill size for 8-32 UNC is used before tapping. Apply an appropriate cutting fluid for the workpiece material even though the tap has no coolant-through capability. For hand-tapping, use a properly sized tap wrench and advance with consistent, steady pressure to avoid tap breakage.