Value Collection JY4847182 Straight Flute Tap 3/4-20 Unef

Product Description

The VALUE COLLECTION JY4847182 is a bottoming straight flute tap designed for cutting 3/4-20 UNEF internal threads in through-holes and blind holes where threads must extend close to the bottom. Made from high-speed steel with a bright uncoated finish, this tap delivers consistent thread quality in a range of ferrous and non-ferrous materials. It features 4 flutes and an H3 thread limit, providing the tolerance class most commonly required for standard-fit threaded assemblies. Overall length is 4.25 inches, and it is configured for right-hand thread cutting. This tool is installed and operated by machinists, maintenance mechanics, and tooling professionals in production and repair environments.

This tap is suited for threading operations where a bottoming chamfer is required, typically in blind-hole applications where full thread engagement near the base of the hole is critical. The 3/4-20 UNEF thread form is used in precision mechanical assemblies, instrumentation, and hydraulic fittings where a finer pitch than UNC is needed for a 3/4-inch diameter fastener. The H3 thread limit supports consistent fit across general-purpose tapping applications in both manual and machine setups.

Key Features

• Bottoming chamfer allows threading to within a few pitches of the bottom of a blind hole
• High-speed steel construction provides durability across a broad range of workpiece materials
• 4-flute straight flute geometry supports chip clearance in through-hole and shallow blind-hole work
• H3 thread limit provides standard tolerance for general-purpose threaded assemblies
• Bright uncoated finish suitable for use with cutting fluids across common materials
• Right-hand thread direction for standard tapping operations

Compatibility

Designed as a standard replacement or production tap for any application requiring a 3/4-20 UNEF bottoming tap with an H3 thread limit and right-hand thread direction.

Installation Notes

This tap should be used with appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality. Secure the workpiece firmly and align the tap perpendicular to the drilled hole before beginning the cut. When using a tapping machine or drill press, confirm the spindle speed is appropriate for the material and tap diameter. Inspect the tap for chipping or wear before each use, and replace if cutting edges are degraded.