Osg 1113400 Straight Flute Plug Tap 9/16-18 Unf Hss

Product Description

The OSG 1113400 is a straight flute plug tap designed for cutting internal threads in a variety of ferrous and non-ferrous materials. Built from high-speed steel with a bright, uncoated finish, it produces 9/16-18 UNF right-hand threads with a plug chamfer entry. The 4-flute design provides stability during the threading operation and is suited for through-hole applications where chips can exit freely. With an overall length of 3-19/32 inches and a thread length of 1-21/32 inches, this tap fits standard tap holders and tap handles used in machine shop and maintenance environments. It carries an H2 thread limit for close-tolerance threading work.

This tap is appropriate for tapping operations in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. It performs well in manual tapping setups and compatible machine tapping applications where a straight flute geometry is preferred. Machinists, maintenance technicians, and industrial tradespeople handling fabrication, repair, and assembly work will find this tap suited to general-purpose threading tasks in both production and field settings.

Key Features

• 9/16-18 UNF thread size with right-hand thread direction
• 4 straight flutes for stability in through-hole tapping operations
• Plug chamfer for standard entry into pre-drilled holes
• High-speed steel construction for durability across ferrous and non-ferrous materials
• H2 thread limit for close-tolerance thread production
• Bright, uncoated finish compatible with a wide range of cutting fluids

Compatibility

Designed as an OEM-style replacement and standard straight flute plug tap for use in 9/16-18 UNF through-hole tapping applications across aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces.

Installation Notes

Install in a compatible tap holder or tap wrench sized for the shank diameter before use. Always power down or de-energize any machine tool before changing tooling. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Follow applicable shop safety procedures when handling cutting tools.