Value Collection JY4862140 Straight Flute Tap 1-1/8-16 Uns

Product Description

The VALUE COLLECTION JY4862140 is a straight flute plug tap designed for cutting right-hand internal threads to the 1-1/8-16 UNS thread standard. Manufactured from high-speed steel with a bright uncoated finish, this tap delivers reliable performance in threading operations on ferrous and non-ferrous materials. The plug chamfer style — typically 3 to 5 threads of lead — makes it suited for through-hole applications and starting threads in blind holes where chamfer clearance permits. At 4 inches overall length and a 3B class of fit with H4 thread limit, it is built to produce threads within standard tolerance ranges for general mechanical assembly.

This tap is used in machine shop, maintenance, and fabrication environments where UNS unified national special threads are specified. The 4-flute straight flute design provides chip clearance during tapping and maintains cutting stability in a variety of materials including mild steel, aluminum, and cast iron. The 1-1/8-16 thread size is common in large fastener applications, heavy equipment components, and custom mechanical assemblies. Machinists, tool and die makers, and maintenance technicians install this tap by hand or with a tapping machine depending on workpiece setup.

Key Features

• 1-1/8-16 UNS thread form for unified national special thread applications
• High-speed steel construction for durability across a range of workpiece materials
• Plug chamfer style suits through-hole and accessible blind-hole tapping
• 4 straight flutes provide chip clearance and cutting stability
• 3B class of fit with H4 thread limit for standard tolerance thread production
• Bright uncoated finish — no thermal or chemical coating that could affect dimensional tolerance

Compatibility

Designed as an OEM-style replacement or direct addition for applications requiring a 1-1/8-16 UNS right-hand internal thread tap in plug chamfer style.

Installation Notes

This tap is installed by machinists or maintenance technicians using a tap wrench, tapping head, or CNC tapping cycle depending on production environment. Before tapping, drill the correct tap drill diameter for 1-1/8-16 UNS thread and secure the workpiece. Apply appropriate cutting fluid for the workpiece material to reduce tool wear and improve thread finish. Do not force the tap if resistance increases — back off to clear chips and re-apply cutting fluid.