Value Collection JY4872149 Hand Tap 1-3/8-16 Uns

Product Description

The VALUE COLLECTION JY4872149 is a straight-flute hand tap designed for cutting 1-3/8-16 UNS internal threads in through-holes and blind holes. Built from high speed steel with a bright, uncoated finish, it delivers reliable thread-cutting performance across a range of ferrous and non-ferrous workpiece materials. The plug chamfer - 3 to 5 threads of lead - makes it suitable for both through-hole and moderately deep blind-hole applications. With 6 flutes and a Class 3B fit, it produces close-tolerance threads appropriate for precision fastening applications. Overall length is 4 inches. Installation is by hand or with a standard tap wrench.

This tap is used in machine shops, maintenance and repair operations, and manufacturing environments where UNS-series threads are required. The 1-3/8-16 thread designation is a coarse-pitch UNS specification, commonly encountered in replacement threading, repair work, and custom fabrication. The right-hand thread direction suits standard fastener systems. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this tool in both production and field-repair settings.

Key Features

• 1-3/8-16 UNS thread specification, right-hand direction
• Plug chamfer provides 3 to 5 threads of lead for through-hole and blind-hole use
• 6-flute straight-flute geometry for controlled chip formation
• Class 3B fit with H4 thread limit for close-tolerance thread production
• High speed steel construction with bright, uncoated finish
• 4-inch overall length for standard tap wrench compatibility

Compatibility

Designed as a standard replacement or new-application hand tap for use with any tap wrench or tapping fixture accepting tooling of this shank size and 4-inch overall length, in applications requiring 1-3/8-16 UNS right-hand threads.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians using a standard tap wrench or tapping fixture. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the work surface before applying cutting pressure. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Back the tap off periodically to break chips and prevent tap breakage, particularly in blind-hole applications.