Value Collection JY4841151 Straight Flute Tap 5/16-20 Uns

Product Description

The VALUE COLLECTION JY4841151 is a straight flute tap designed for cutting internal threads in a wide range of metalworking and machining applications. Built from high-speed steel with a bright/uncoated finish, this bottoming tap produces a 5/16-20 UNS right-hand thread and carries a 3B class of fit for standard tolerance threading. The H3 thread limit provides consistent oversize control. With 4 flutes and a bottoming chamfer, it is suited for threading holes close to the bottom, making it a practical choice for machinists, toolroom technicians, and maintenance mechanics working with blind holes.

This tap is used in general-purpose threading operations across job shops, production facilities, and maintenance environments. The bottoming chamfer allows threading to within 1 to 2 threads of the bottom of a blind hole, which is critical when thread engagement depth is limited. It is appropriate for use in steel, aluminum, brass, and other machinable materials where a 5/16-20 UNS thread form is specified. The 2-23/32 inch overall length provides adequate reach for most standard workpiece thicknesses.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• 5/16-20 UNS thread form with right-hand thread direction
• 3B class of fit for standard internal thread tolerance
• H3 thread limit for controlled oversize tolerance
• High-speed steel construction for durability across common machinable materials
• 4 straight flutes for chip clearance in through and blind hole applications

Compatibility

Designed as a standard replacement or supplemental tap for use in any application requiring a 5/16-20 UNS internal right-hand thread with a 3B class of fit.

Installation Notes

This tap is installed by machinists and toolroom technicians using a tap wrench, tapping head, or CNC machine spindle rated for the appropriate torque range. Always ensure the workpiece is securely fixtured and the hole is drilled to the correct tap drill diameter before tapping. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if cutting edges are damaged.