Regal Cutting Tools 018355RS 6-40 Unf Plug Hand Tap Solid Carbide

Product Description

The REGAL CUTTING TOOLS 018355RS is a straight-flute hand tap designed for cutting 6-40 UNF internal threads in precision applications. Manufactured from micrograin solid carbide with a bright, uncoated finish, this plug-chamfer tap produces clean, accurate threads in hard or abrasive materials where high-speed steel tooling falls short. It runs right-hand thread direction and conforms to a 2B class of fit with an H2 thread limit, making it suitable for applications that require close dimensional control. Trade machinists, tool and die makers, and precision metalworking shops are the primary users of this tap.

This tap is suited for threading small-diameter holes in ferrous and non-ferrous alloys, composites, and other materials where carbide hardness and rigidity are required. The 6-40 UNF thread form is common in instrumentation, electronics hardware, and precision mechanical assemblies. The straight-flute geometry makes it appropriate for through-holes and blind holes where chip management is controlled manually or with cutting fluid. It belongs to REGAL CUTTING TOOLS Series 2014.

Key Features

• Micrograin solid carbide construction for extended tool life in hard or abrasive materials
• Bright, uncoated finish suitable for a wide range of cutting fluid applications
• Plug chamfer (3-5 thread lead) for general-purpose through-hole and blind-hole tapping
• 3-flute straight-flute design provides rigidity and consistent thread form at small diameters
• H2 thread limit and 2B class of fit for controlled dimensional tolerance
• Right-hand thread direction, 40 threads per inch, UNF standard

Compatibility

Designed as an OEM-style replacement or direct-use hand tap for applications requiring a 6-40 UNF plug tap in solid carbide, Series 2014.

Installation Notes

This tap is intended for use by machinists and precision metalworking professionals using standard tap wrenches or tapping fixtures. Ensure the workpiece is properly fixtured and the tap is aligned perpendicular to the hole before applying torque. Use an appropriate cutting fluid for the workpiece material to reduce heat and tool wear. Solid carbide taps are brittle - avoid lateral loading or side pressure during use, as this can cause breakage.