Value Collection JY63328462 Spiral Flute Tap 3/4-16 Unf

Product Description

The VALUE COLLECTION JY63328462 is a spiral flute bottoming tap designed for cutting internal threads in through-holes and blind holes where threads must extend close to the bottom. Built from high-speed steel (HSS) with a bright/uncoated finish, this tap is suited for threading operations in soft to medium-hardness nonferrous metals. The 3/4-16 UNF thread form and 3B class of fit make it a standard choice for fine-pitch threaded connections requiring controlled tolerances. With a 45-degree helix angle and fast flute style, the spiral flute geometry pulls chips up and out of the hole during tapping, reducing the risk of chip packing in blind-bore applications. Overall length is 4.25 inches.

This tap is intended for use in machining, maintenance, and repair applications where 3/4-16 UNF threads are required. It is well suited for threading aluminum, brass, copper, magnesium, and zinc die cast workpieces. The bottoming chamfer style allows threads to be cut to within a few pitches of the bottom of a blind hole, making it appropriate for applications where full thread depth is critical. It is typically used in machine shops, tool rooms, and field repair environments by machinists and maintenance technicians.

Key Features

• 3/4-16 UNF fine-pitch thread form with 3B class of fit for controlled tolerance threaded connections
• Bottoming chamfer cuts threads close to the base of blind holes
• 45-degree helix angle with fast spiral flute style evacuates chips efficiently during tapping
• High-speed steel construction provides durability across a range of nonferrous materials
• Bright/uncoated finish suitable for use with cutting fluids in aluminum, brass, copper, magnesium, and zinc die cast
• Right-hand thread direction and right-hand flute orientation for standard tapping setups

Compatibility

Designed for threading aluminum, brass, copper, magnesium, and zinc die cast workpieces requiring 3/4-16 UNF internal threads with a 3B class of fit.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap wrench, tapping head, or CNC machine spindle. Always secure the workpiece before tapping and use an appropriate cutting fluid for the material being threaded. Ensure the tap is properly aligned to avoid thread distortion or tap breakage. Do not force the tap if resistance increases unexpectedly — back off to clear chips before continuing.