Value Collection JY4838777 Straight Flute Tap 12-48 Uns

Product Description

The VALUE COLLECTION JY4838777 is a straight flute tap designed to cut internal threads in through-holes and blind holes where chip evacuation is not a primary concern. Built from high-speed steel with a bright, uncoated finish, this tap features a plug chamfer with 4 flutes and is ground to an H2 thread limit for consistent dimensional accuracy. It cuts a 12-48 UNS right-hand thread and measures 2.375 inches overall length. This tap is suited for machinists and toolroom technicians working on precision threading operations in ferrous and non-ferrous materials.

This tap is intended for use in standard production and maintenance threading applications where straight flute geometry is appropriate. The plug chamfer, with its moderate lead-in, makes it suitable for starting threads in both through-holes and sufficiently deep blind holes. The 12-48 UNS thread form is a Unified National Special designation used in specialized fastener and instrument applications. Class 3B fit indicates a tight tolerance thread suitable for precision assemblies requiring close mating of threaded components.

Key Features

• High-speed steel construction for durability in general-purpose threading
• Bright, uncoated finish suitable for use with cutting fluids in a range of materials
• Plug chamfer for versatile use in through-holes and deeper blind holes
• 4-flute design provides balanced cutting action and adequate chip clearance
• H2 thread limit ensures consistent, tight dimensional control
• Right-hand thread direction, 3B class of fit for precision assemblies

Compatibility

Designed as a standard replacement or production tap for applications requiring a 12-48 UNS internal thread with a 3B class of fit.

Installation Notes

This tap is installed by machinists or toolroom technicians using a tap wrench, tapping head, or CNC tapping cycle. Always ensure the workpiece is properly secured and the tap is started square to the hole to prevent tap breakage. Apply appropriate cutting fluid for the material being tapped. Do not exceed the tap's rated capacity, and back off periodically to break chips when tapping deeper holes.