Value Collection JY9039942 Straight Flute Tap 1-1/4-28 Uns

Product Description

The VALUE COLLECTION JY9039942 is a straight flute tap designed for cutting 1-1/4-28 UNS internal threads in a variety of workpiece materials. Built from high-speed steel with a bright, uncoated finish, this tap features six flutes and a bottoming chamfer that allows threading close to the bottom of a blind hole. It carries a 3B class of fit and an H4 thread limit, making it appropriate for standard-tolerance threaded connections. The 4-inch overall length and 1.5-inch thread length suit common machine shop and maintenance threading operations. Right-hand cutting direction is standard. Machinists and toolmakers rely on this configuration for production and repair threading work.

This tap is suited for use in machine shop environments, maintenance and repair operations, and production threading applications where a 1-1/4-28 UNS thread form is required. The bottoming chamfer style is the correct choice when threads must extend to or near the base of a blind hole, where a plug or taper chamfer would leave unthreaded material. It is driven by a standard tap wrench, tapping head, or CNC tapping attachment. Coolant-through capability is not included in this tool.

Key Features

• Bottoming chamfer allows threading to the bottom of blind holes
• Six flutes provide chip clearance and stability during cutting
• High-speed steel construction handles a wide range of workpiece materials
• 3B class of fit and H4 thread limit deliver standard tolerance threaded connections
• Bright, uncoated finish with right-hand cutting direction
• No coolant-through requirement simplifies setup

Compatibility

Designed for cutting 1-1/4-28 UNS right-hand internal threads. Compatible with standard tap wrenches, tapping heads, and CNC tapping attachments that accept the corresponding tap shank size.

Installation Notes

This tool is installed and operated by qualified machinists or toolmakers following standard threading procedures. Ensure the workpiece is properly secured and the tap is started square to the hole centerline to prevent tap breakage. Apply cutting fluid appropriate for the workpiece material to extend tool life and improve thread finish. Follow all applicable shop safety protocols when operating tapping equipment.