Value Collection JY4876090 Straight Flute Tap 1-5/8-12 Uns

Product Description

The VALUE COLLECTION JY4876090 is a straight flute bottoming tap designed for cutting 1-5/8-12 UNS right-hand internal threads in through-holes and blind holes that require threading close to the bottom. Manufactured from high-speed steel with a bright uncoated finish, this tap offers solid performance across a range of ferrous and non-ferrous workpiece materials. With 6 flutes and an H6 thread limit, it provides consistent thread tolerance and stable chip control during hand or machine tapping operations. The 5-inch overall length gives adequate reach and handle clearance in most setup configurations. Machinists, toolmakers, and maintenance technicians working in industrial, manufacturing, and MRO environments will find this tap suited to general-purpose threading tasks.

This tap is used wherever a 1-5/8-12 UNS internal thread form is required. The bottoming chamfer — typically 1 to 2 threads of lead — allows threading to within one or two threads of a blind hole bottom, making it the correct choice when full thread depth near the base of a hole is required. It is appropriate for use in manual tap handles, drill press setups, or rigid tapping on CNC and manual lathes and mills. Applications include heavy equipment repair, hydraulic component fabrication, and tooling fixture work where coarse UNS thread profiles are specified.

Key Features

• Bottoming chamfer allows threading to within 1-2 threads of blind hole bottom
• 6-flute design provides increased thread contact and improved surface finish on the cut thread
• High-speed steel construction withstands heat generated during tapping without rapid edge breakdown
• H6 thread limit ensures controlled oversize tolerance for consistent fit with standard UNS fasteners
• Bright uncoated finish suitable for use with a wide range of cutting fluids and tapping compounds
• Right-hand thread direction for standard tapping operations

Compatibility

Designed for cutting 1-5/8-12 UNS right-hand internal threads. Intended for use with standard tap handles, tapping heads, and rigid tapping setups sized for large-diameter taps. No specific machine or workpiece model compatibility was stated by the manufacturer for this part.

Installation Notes

This tap should be installed and operated by qualified machinists or maintenance technicians familiar with threading operations. Always secure the workpiece and ensure the tap is started square to the hole axis to prevent cross-threading or tap breakage. Apply an appropriate cutting fluid or tapping compound for the workpiece material before and during tapping. For blind holes, clear chips frequently by reversing the tap to avoid chip packing, which can cause tap breakage at this diameter.