Regal Cutting Tools 029261AS Straight Flute Tap M30x3.50

Product Description

The REGAL CUTTING TOOLS 029261AS is a straight flute tap designed for cutting M30x3.50 metric coarse internal threads in metalworking and machining applications. Built from high-speed steel (HSS) with a bright/uncoated finish, this tap features a taper chamfer to ease thread entry and a left-hand thread form. The 4-flute straight flute geometry moves chips back along the flute rather than forward, making it suitable for through-hole and blind-hole applications in harder materials. With an overall length of 5.4375 inches and a thread length of 2.5625 inches, this tap is sized for heavy industrial threading work where M30 fastener applications are required.

This tap is used in machine shops, maintenance and repair operations, and production environments where large-diameter metric left-hand threads must be cut or restored. Left-hand thread taps are typically selected for applications involving left-hand fasteners, reverse-threaded components, or assemblies that require counter-rotation resistance. The taper chamfer style makes this tap well suited for starting threads from scratch in through-hole work or where gradual thread engagement is preferred. Machinists and toolmakers working with steel, cast iron, and similar ferrous materials will find this tool appropriate for standard machine tapping operations.

Key Features

• M30x3.50 metric coarse thread form for large-diameter internal threading
• Left-hand thread direction for reverse-threaded fastener applications
• Taper chamfer for gradual thread engagement and easier tap entry
• 4 straight flutes for chip clearance in through-hole and blind-hole work
• High-speed steel construction for durability in ferrous metal applications
• H5 thread limit for controlled tolerance threading

Compatibility

Designed as an OEM-style replacement or direct-use tap for machine tapping operations requiring M30x3.50 metric coarse left-hand threads in standard tapping chucks and holders accepting a 1.0210-inch shank diameter.

Installation Notes

This tap should be installed and operated by qualified machinists familiar with tapping speeds, feeds, and cutting fluid requirements for HSS tooling. Ensure the tapping machine or lathe is powered down and properly locked out before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not exceed recommended surface speeds for high-speed steel taps in the material being threaded.