Value Collection JY4844007 Straight Flute Tap 1/2-12 Uns

Product Description

The VALUE COLLECTION JY4844007 is a straight flute tap designed for cutting 1/2-12 UNS internal threads in a bottoming application. Manufactured from high-speed steel (HSS) with a bright/uncoated finish, this tap produces clean, accurate threads in a range of ferrous and non-ferrous materials. The 4-flute straight flute geometry provides chip control in through-hole and blind-hole operations, while the bottoming chamfer allows threading as close to the bottom of a blind hole as the application requires. With a 3B class of fit and H3 thread limit, the tap delivers threads suited for standard-tolerance fastener assemblies.

This tap is intended for use in machining, maintenance, and toolroom environments where 1/2-12 UNS threads are required. The UNS (Unified National Special) thread form is used in specialized mechanical assemblies and equipment where standard coarse or fine pitch designations do not apply. The bottoming chamfer configuration makes this tap appropriate for blind holes where full thread depth near the bottom of the bore is necessary. It is typically installed by machinists, tool-and-die professionals, and maintenance mechanics using a tap wrench, tapping head, or CNC machine tool.

Key Features

• 1/2-12 UNS thread size with bottoming chamfer for maximum thread depth in blind holes
• 4 straight flutes for chip management in a variety of materials
• High-speed steel construction for durability across general-purpose tapping operations
• Bright/uncoated finish suitable for use with standard cutting fluids
• 3B class of fit with H3 thread limit for consistent standard-tolerance threads
• Right-hand thread direction; overall length of 3.375 inches

Compatibility

Designed as an OEM-style replacement or toolroom-stock tap for applications requiring 1/2-12 UNS right-hand internal threads in blind-hole configurations.

Installation Notes

Install in a tap wrench, tapping head, or appropriate machine tool spindle before use. Always apply a suitable cutting fluid matched to the workpiece material to extend tool life and improve thread finish. Secure the workpiece firmly and align the tap perpendicular to the bore before beginning the threading operation. Inspect the tap for wear or damage before each use; a worn or chipped tap can produce out-of-tolerance threads or break in the workpiece.