Value Collection MSC-04426425 6-40 Unf Straight Flute Tap Hss

Product Description

The VALUE COLLECTION MSC-04426425 is a straight flute tap designed for cutting internal 6-40 UNF threads in a range of materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread formation in both through-hole and blind-hole applications where straight flute geometry is appropriate. The taper chamfer eases entry and distributes cutting load gradually across the leading threads. With an overall length of 2 inches and a thread length of 0.6875 inches, it fits standard tap handles and machine setups used in precision threading work across metalworking and light mechanical trades.

This tap is suited for threading small-diameter fastener holes in ferrous and non-ferrous metals, plastics, and similar materials where a 6-40 UNF thread form is specified. It is commonly used in instrument assembly, electronics enclosures, and small mechanical assemblies requiring fine-thread engagement. The right-hand thread direction and 2B/3B class of fit make it appropriate for standard UNF fastener systems where controlled tolerances are required.

Key Features

• 6-40 UNF thread form with H2 thread limit for controlled tolerance output
• Taper chamfer for gradual thread engagement and reduced starting force
• 3-flute straight flute design suited to through-hole and shorter blind-hole applications
• High-speed steel construction for durability across a range of common materials
• Bright, uncoated finish — no coating buildup affecting thread tolerance
• Right-hand thread direction; coolant-through feature not present

Compatibility

Designed as an OEM-style threading tool for use in standard tap handles, T-handle wrenches, or machine tap chucks sized for small-diameter taps requiring a 6-40 UNF thread form.

Installation Notes

This tap is installed and operated by machinists or mechanical technicians using a standard tap handle or machine setup. Secure the workpiece fully before beginning to thread. Apply appropriate cutting fluid for the material being tapped to extend tool life and improve thread finish. Avoid forcing the tap — back off periodically to break chips and prevent tap breakage, particularly in blind-hole applications.