Value Collection JY4843413 Hand Tap 7/16-40 Uns Bottoming Hss

Product Description

The VALUE COLLECTION JY4843413 is a bottoming hand tap designed for cutting 7/16-40 UNS internal threads in through-holes and blind holes where full thread depth to the bottom is required. Manufactured from high speed steel (HSS) with a bright, uncoated finish, this tap offers solid wear resistance for general threading operations in ferrous and non-ferrous materials. It features four straight flutes and a right-hand thread direction, making it suited for use with standard tap wrenches or threading accessories. The overall length is 3-5/32 inches, and it is ground to a 3B class of fit with an H3 thread limit for consistent tolerance control.

This tap is used in machine shops, maintenance facilities, and fabrication environments where UNS 7/16-40 threads are required. The bottoming chamfer — typically 1 to 2 threads of taper — allows threading close to the bottom of a blind hole after a taper or plug tap has established the thread. It is appropriate for hand tapping operations performed by machinists, millwrights, and maintenance technicians working on precision assemblies or repair tasks requiring fine-pitch threads in the 7/16 inch diameter range.

Key Features

• Bottoming chamfer allows threading to the bottom of blind holes
• High speed steel construction provides durability across a range of work materials
• Bright, uncoated finish suitable for use with standard cutting fluids
• 4-flute straight flute design for chip control in through and blind hole applications
• H3 thread limit and 3B class of fit ensure consistent thread tolerance
• Right-hand thread direction for standard tapping operations

Compatibility

Designed as an OEM-style threading tool for hand tapping applications requiring 7/16-40 UNS internal threads to a 3B class of fit.

Installation Notes

Hand tapping should be performed by a qualified machinist or technician using a properly sized tap wrench. Apply an appropriate cutting fluid for the work material to reduce friction and extend tap life. Advance the tap in short increments and reverse periodically to break chips, especially in blind hole applications. Inspect the tap for wear or chipping before each use, as a damaged tap can cause thread damage or breakage in the workpiece.