Value Collection JY4846150 Straight Flute Tap 5/8-20 Uns

Product Description

The VALUE COLLECTION JY4846150 is a straight flute bottoming tap designed for cutting internal 5/8-20 UNS right-hand threads in through-holes and blind holes where full thread depth near the bottom is required. Manufactured from high-speed steel with a bright/uncoated finish, this tap delivers reliable performance across a range of ferrous and non-ferrous materials. The 4-flute configuration provides stable cutting action and adequate chip clearance for the thread size. With an overall length of 3-13/16 inches and an H3 thread limit, this tap holds close tolerance for production and maintenance threading operations. Machinists, tool-and-die tradespeople, and maintenance technicians are the primary users.

This bottoming tap is suited for applications where thread engagement must extend to the bottom of a blind hole, or where a preceding taper or plug tap has already started the thread. The 5/8-20 UNS thread form is used in specialized mechanical assemblies, fluid fittings, and custom-engineered components requiring a finer pitch than the standard UNC series. It is appropriate for bench work, drill press setups, and CNC tapping operations in shops handling both production runs and one-off repair work.

Key Features

• Bottoming chamfer allows threading to the full depth of blind holes
• 4 straight flutes provide stable cutting geometry and chip relief
• High-speed steel construction handles a wide range of workpiece materials
• H3 thread limit ensures consistent 3B class of fit tolerances
• Bright/uncoated finish suitable for use with cutting fluids in general-purpose threading
• Right-hand thread direction for standard tapping operations

Compatibility

Designed for cutting 5/8-20 UNS 3B class of fit internal threads. Compatible with standard tap holders, T-handle wrenches, and CNC tapping chucks sized for the tap shank. No coolant-through feature; external cutting fluid application is recommended.

Installation Notes

Threading operations should be performed by a qualified machinist following applicable shop safety procedures. Secure the workpiece firmly before tapping to prevent movement under load. Apply an appropriate cutting fluid for the workpiece material to extend tap life and improve thread finish. Because this is a bottoming tap, use a taper or plug tap first to start and advance the thread before finishing with this tool to avoid tap breakage in blind holes.