Value Collection JY4849170 Straight Flute Tap 1-18 Uns

Product Description

The VALUE COLLECTION JY4849170 is a straight flute tap designed to cut internal threads in through-holes and shallow blind holes across a range of metalworking applications. Built from high-speed steel with a bright, uncoated finish, this tap is ground to a 1-18 UNS thread form with a plug chamfer that distributes cutting load gradually across the first 3 to 5 threads. With 4 flutes and an H4 thread limit, it delivers consistent thread quality in materials suited to general-purpose tapping. Overall length is 5.125 inches, giving adequate reach and wrench clearance in typical machining setups. Machinists, tool-and-die makers, and maintenance technicians are the primary users of this tool.

This tap is suited for production and maintenance machining environments where a 1-18 UNS internal thread is required. The plug chamfer style makes it appropriate for through-hole tapping or blind holes with sufficient thread runout. The 3B class of fit specifies a standard tolerance range for general-purpose threaded fastener assemblies. Right-hand thread direction is standard for the majority of fastener and assembly applications encountered in industrial, mechanical, and structural work.

Key Features

• 1-18 UNS thread form for unified national special-series threading requirements
• 4 straight flutes provide chip clearance and stability during the cut
• Plug chamfer distributes cutting force across 3 to 5 leading threads for smoother entry
• H4 thread limit for controlled tolerance and consistent fit in 3B-class assemblies
• High-speed steel construction handles a broad range of workpiece materials
• Bright, uncoated finish — ready for use with standard cutting fluids

Compatibility

Designed as an OEM-style replacement or direct-use tap for applications requiring a 1-18 UNS, 3B class of fit, right-hand internal thread in metalworking operations.

Installation Notes

This tap should be installed and operated by qualified machinists or maintenance technicians familiar with tapping procedures and machine shop safety practices. Power down and secure any power tapping equipment before changing tools. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Inspect the tap for chipping or wear before each use and do not force a worn or damaged tap.