Value Collection JY4848750 Straight Flute 15/16-20 Unef Tap

Product Description

The VALUE COLLECTION JY4848750 is a straight flute plug tap designed for cutting right-hand internal threads to a 15/16-20 UNEF specification. Built from high-speed steel with a bright, uncoated finish, this tap delivers reliable performance in a wide range of ferrous and non-ferrous materials. The plug chamfer — typically 3 to 5 threads — eases entry into through-holes and blind holes with adequate clearance. At 4-29/32 inches overall length and with 4 flutes, it is suited for use with standard tap handles, tapping heads, or drill press setups in both production and maintenance environments.

This tap is appropriate for threading operations in machine shops, maintenance and repair facilities, and manufacturing lines wherever a 15/16-20 UNEF thread form is required. The H4 thread limit provides controlled oversize tolerance for use with standard 3B class of fit thread gauging. Machinists, toolmakers, and maintenance technicians are the primary users. It is well suited to hand tapping as well as light machine tapping where straight-flute tooling is preferred over spiral options.

Key Features

• 15/16-20 UNEF thread form for fine-pitch internal threading
• Plug chamfer (approximately 3-5 lead threads) for easy thread start in through or open blind holes
• 4 straight flutes for chip clearance and rigidity in short-chipping materials
• H4 thread limit for 3B class of fit compliance
• High-speed steel construction for durability across a range of workpiece materials
• Bright/uncoated finish — no additional coating to affect thread tolerance
• Right-hand thread direction, standard cutting orientation

Compatibility

Designed as a standard replacement or supplemental tap for any application requiring a 15/16-20 UNEF right-hand internal thread with a 3B class of fit and H4 thread limit.

Installation Notes

Install in a properly sized tap wrench, tapping head, or machine spindle before use. Always ensure the workpiece is secured and the pilot hole is drilled to the correct tap drill diameter for a 15/16-20 UNEF thread prior to tapping. Apply appropriate cutting fluid to extend tool life and reduce heat buildup. Reverse the tap periodically during hand tapping to break chips and prevent binding or tap breakage.