Osg 1124700 Straight Flute Tap 11/16-16 Uns Bottoming Hss

Product Description

The OSG 1124700 is a straight flute bottoming tap designed for cutting 11/16-16 UNS right-hand internal threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel (HSS) with a bright uncoated finish, this tap delivers consistent thread form in production and repair applications. The bottoming chamfer style allows threading to the bottom of blind holes, making it a go-to choice when full thread depth is required close to the floor of a bored or drilled cavity. With 4 flutes and an H3 thread limit, it holds tight tolerances for standard fit classes. Licensed machinists and toolroom technicians are the primary users.

This tap is suited for threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The Series 101 designation places it in OSG standard catalog tooling, making it a practical choice for general shop use, maintenance repair, and production tapping where a bottoming tap is required to complete a thread started by a taper or plug tap. The straight flute geometry works well in through-hole and short blind-hole applications where chip evacuation is managed manually or by the machine cycle.

Key Features

• Bottoming chamfer threads to the bottom of blind holes
• H3 thread limit for standard tolerance fits
• 4 straight flutes for consistent chip formation across supported materials
• High-speed steel construction handles a broad range of workpiece materials
• Bright uncoated finish suitable for use with cutting oil or tapping fluid
• No coolant-through requirement simplifies setup on manual and CNC machines

Compatibility

Designed for tapping 11/16-16 UNS right-hand threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Compatible with standard tap holders and chucks sized for a 0.542-inch shank diameter.

Installation Notes

Use appropriate cutting fluid or tapping compound for the workpiece material before starting the thread. Ensure the tap is held square to the drilled hole to prevent thread runout and tap breakage. On manual machines, back the tap off periodically to break chips. Follow the machine shop or facility safety procedures for securing workpieces and operating rotating tooling.