Guhring 9039020035050 Spiral Point Tap 6-40 Unf Hss-e

Product Description

The GUHRING 9039020035050 is a spiral point tap designed for through-hole threading in steel and similar ferrous materials. Built from HSS-E cobalt high-speed steel, it delivers the heat and wear resistance needed for production tapping and repetitive use. The plug chamfer distributes cutting load gradually over the first few threads, making it well suited for through-hole applications where the tap can feed chips forward ahead of the cut. With a 6-40 UNF thread profile, 3 flutes, a 2B class of fit, and a thread limit of H2/H3, this tap produces consistent, tolerance-controlled threads in light-duty fastener holes common in precision assemblies and instrumentation work.

This tap is used in through-hole threading operations on steel workpieces. It is suited for machine tapping on CNC mills, drill presses, and tapping heads in both job shop and production environments. The 6-40 UNF size is common in electronics enclosures, instrument panels, and small mechanical assemblies where fine-thread engagement is required in limited material thickness. The H2/H3 thread limit supports standard 2B fit tolerances for general-purpose unified fine-thread fasteners.

Key Features

• HSS-E cobalt construction provides elevated heat resistance for tapping steel and harder ferrous alloys
• Spiral point geometry pushes chips forward, keeping flutes clear in through-hole applications
• Plug chamfer distributes cutting load over several threads for smoother entry and reduced tap breakage risk
• H2/H3 thread limit holds 2B class of fit tolerances for standard UNF fastener compatibility
• Bright/uncoated finish allows visual wear inspection and suits a wide range of cutting fluids
• Right-hand cut, 3-flute design balances chip clearance with thread form support in small-diameter tapping

Compatibility

Designed as an OEM-style replacement or direct-use tap for through-hole 6-40 UNF threading applications in steel. Fits standard tap holders and quick-change tapping heads accepting straight-shank taps with a 0.141-inch shank diameter.

Installation Notes

Machine tapping should be performed by a qualified machinist or tooling technician following standard tapping procedures. Secure the workpiece firmly and ensure the tap is aligned perpendicular to the hole to prevent thread distortion or breakage. Apply an appropriate cutting fluid for steel before and during the tapping operation. Do not reverse the tap under power without confirming the machine or tapping head is equipped for synchronized reversing.