Value Collection MSC-04489407 Straight Flute Tap 1-1/4-7 Unc

Product Description

The VALUE COLLECTION MSC-04489407 is a straight flute tap designed for cutting internal threads in through-holes and shallow blind holes. It is a plug chamfer style tap with 4 flutes, manufactured from high speed steel with a bright uncoated finish. The 1-1/4-7 UNC thread form and 3B class of fit make it suitable for standard fastener thread production in ferrous and non-ferrous materials. With a thread length of 2.5625 inches and an overall length of 5.75 inches, this tap handles typical production and maintenance threading tasks. Machinists and tool-and-die technicians use this style of tap in manual and CNC threading operations.

This tap is suited for threading operations in machine shops, maintenance facilities, and production environments where UNC coarse-thread specifications are required. The plug chamfer style provides a gradual lead-in that distributes cutting load across several threads, making it well-suited for through-hole threading as well as moderately deep blind-hole applications. Right-hand thread direction aligns with standard UNC fastener specifications. The H4 thread limit is appropriate for applications requiring controlled oversize tolerance to account for coating or plating of mating components.

Key Features

• 1-1/4-7 UNC thread form with 3B class of fit for standard fastener compatibility
• Plug chamfer with 4 flutes for balanced cutting load distribution in through-holes
• High speed steel construction provides durability across a range of workpiece materials
• H4 thread limit accommodates mating parts that will receive a plated or coated finish
• Bright uncoated finish maintains dimensional precision without added coating thickness
• Right-hand thread direction compatible with standard UNC fastener specifications

Compatibility

Designed as a standard UNC straight flute tap for use in manual tap handles, adjustable tap wrenches, and CNC rigid tapping setups that accept straight shank taps of this diameter and overall length.

Installation Notes

This tap should be installed by a qualified machinist familiar with thread tapping operations and proper speeds and feeds for high speed steel tooling. Ensure the workpiece is securely fixtured and a compatible cutting fluid or tapping compound is applied before beginning the threading operation. For CNC applications, verify that the machine is set for rigid tapping mode and that spindle speed is appropriate for the material being threaded. Inspect the tap for wear or chipping before each use and replace when cutting performance degrades to avoid thread form damage.