Value Collection JY4863213 Hand Tap 1-3/16-20 Uns Bottoming Hss

Product Description

The VALUE COLLECTION JY4863213 is a bottoming hand tap designed for cutting right-hand internal threads in a 1-3/16-20 UNS thread form. Built from high speed steel with a bright, uncoated finish, this tap is suited for threading operations that require the thread to extend fully to the bottom of a blind hole. The 6-flute straight flute design provides clean chip evacuation and stable cutting geometry. At 4 inches overall length, it fits standard tap handles used in bench and field threading work. The H4 thread limit and 3B class of fit make it appropriate for standard commercial thread tolerances.

This tap is used in machining, maintenance, and repair applications where a 1-3/16-20 UNS thread must be cut to the full depth of a blind hole. Bottoming taps are typically the final tap used in a three-tap sequence, following a taper and plug tap, to finish the thread to the bottom of the bore. It is appropriate for use in steel, cast iron, aluminum, and similar materials where high speed steel tooling is sufficient. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this type of tap.

Key Features

• Bottoming chamfer cuts threads to the bottom of blind holes
• 1-3/16-20 UNS thread form for non-standard unified thread applications
• High speed steel construction provides durability across a range of workpiece materials
• 6-flute straight flute geometry for stable cutting and chip control
• H4 thread limit with 3B class of fit for standard commercial tolerances
• Bright, uncoated finish — no coating buildup to affect thread dimensions

Compatibility

Designed as an OEM-style replacement or standard tooling option for any application requiring a right-hand 1-3/16-20 UNS bottoming hand tap with a 3B class of fit.

Installation Notes

Use a properly sized tap handle rated for the tap shank diameter to avoid breakage. Ensure the workpiece is securely fixtured before tapping. Apply cutting fluid appropriate for the workpiece material to reduce friction and extend tap life. As a bottoming tap, it should be used as the final step after a taper or plug tap has already started the thread.