Value Collection JY4886099 Bottoming Hand Tap 2-5/8-12 Uns

Product Description

The VALUE COLLECTION JY4886099 is a bottoming hand tap designed for cutting internal threads in pre-drilled holes where full thread engagement is required close to the bottom of a blind bore. Manufactured from bright, uncoated high speed steel, this tap features a 6-flute straight-flute configuration and a right-hand thread direction. It is sized for 2-5/8-12 UNS threading with an H6 thread limit, giving machinists and tool-room technicians precise dimensional control. With an overall length of 5.5 inches and a thread length of 2 inches, it is built for production and maintenance tapping operations across a range of metalworking applications.

This tap is suited for threading operations in manufacturing, job-shop machining, and maintenance-repair environments where UNS (Unified National Special) thread forms are specified. The bottoming chamfer — typically 1 to 2 threads of lead — allows threading to within a very short distance of the bottom of a blind hole, making it the correct choice when a plug or taper tap has already started the thread and full-depth engagement is required. It is installed by hand or in a tapping fixture and is intended for use by machinists, toolmakers, and skilled maintenance technicians.

Key Features

• Bottoming chamfer for threading to the base of blind holes
• 6-flute straight-flute design for stable, balanced cutting action
• High speed steel construction provides hardness and wear resistance in ferrous and non-ferrous materials
• Bright (uncoated) finish — suitable for use with cutting fluids in general-purpose tapping
• H6 thread limit for controlled oversize tolerance on the finished thread
• Right-hand thread direction, standard for conventional threading operations

Compatibility

Designed for cutting 2-5/8-12 UNS right-hand internal threads. The UNS thread standard accommodates special thread-per-inch combinations not covered by standard UN series, making this tap appropriate for applications where a 2-5/8-12 thread form is specified by engineering drawing or component requirement.

Installation Notes

This tap is used by machinists and toolmakers and should be operated with a properly sized tap wrench or tapping fixture to maintain alignment with the drilled hole. Always apply an appropriate cutting fluid for the workpiece material before and during tapping to reduce heat and extend tool life. Ensure the pilot hole diameter matches the recommended tap drill size for a 2-5/8-12 UNS thread before beginning the tapping operation. Do not force the tap if resistance is felt — back off to clear chips before continuing.