Value Collection MSC-04465191 Straight Flute Tap 9/16-18 Unf

Product Description

The VALUE COLLECTION MSC-04465191 is a straight flute bottoming tap designed for cutting 9/16-18 UNF internal threads in through-holes and blind holes requiring threads close to the bottom. Made from high-speed steel with a bright, uncoated finish, this tap delivers reliable performance in a range of ferrous and non-ferrous materials. With 4 flutes and an H2 thread limit, it produces accurate threads while maintaining tight tolerance control. The 3-3/8-inch overall length and 1-21/32-inch thread length suit standard hand-tapping and machine-tapping setups. Machinists, maintenance mechanics, and tool-and-die tradespeople use this tap for production and repair threading work.

This tap is suited for threading operations in job shops, maintenance facilities, and manufacturing environments. The bottoming chamfer — typically 1 to 2 threads of taper — allows threading to the bottom of blind holes where plug or taper taps cannot reach. The right-hand thread direction is standard for UNF fastener applications. It is appropriate for use in manual tap handles, tapping heads, or CNC machine tapping cycles where HSS tooling is specified.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• 9/16-18 UNF thread form for fine-thread fastener applications
• High-speed steel construction provides durability across common workpiece materials
• 4-flute straight design handles chip clearance in through and shallow blind holes
• H2 thread limit ensures tight tolerance compliance for standard UNF fits
• Bright, uncoated finish compatible with a wide range of cutting fluids

Compatibility

Designed as a standard straight flute bottoming tap for 9/16-18 UNF threading applications in manual and machine tapping setups.

Installation Notes

This tap is installed and used by machinists and maintenance technicians performing internal threading operations. Always secure the workpiece before tapping and apply appropriate cutting fluid for the workpiece material. When tapping blind holes, advance the tap carefully to avoid bottoming out under power and breaking the tool. Inspect threads with a go/no-go gauge after tapping to verify thread form and tolerance.