Walter-prototyp 7427651 Thread Forming Tap 10-32 Unf

Product Description

The WALTER-PROTOTYP 7427651 is a thread forming tap in the TC410 Advance series, designed for cold-form threading in both blind-hole and through-hole applications. It produces 10-32 UNF threads to a 2BX class of fit using a modified bottoming chamfer with 2-3 chamfered threads. Manufactured from High-Speed Steel-E and coated with Titanium Nitride, the tap offers wear resistance and reduced friction during the forming process. Overall length is 2.756 inches, with a tapping depth of 0.984 inches and a thread length of 0.512 inches.

This tap is suited for machine shops, production facilities, and field maintenance environments where precise internal thread forming is required. The 10-32 UNF thread size is common in electrical enclosures, instrumentation panels, and light mechanical assemblies. The semi-bottoming chamfer makes it usable in both shallow blind holes and through-hole setups. Material application codes P, M, K, N, and S indicate suitability across steel, stainless steel, cast iron, non-ferrous materials, and heat-resistant alloys. Machinists, tool-and-die professionals, and industrial maintenance technicians are the primary installers.

Key Features

• Thread forming design displaces material rather than cutting, producing stronger threads with no chip generation
• Titanium Nitride coating reduces friction and extends tap life in production runs
• High-Speed Steel-E construction with material grade WY80AD for toughness and wear resistance
• Modified bottoming chamfer with 2-3 chamfered threads for blind-hole and through-hole use
• Five oil grooves support lubrication distribution during the forming process
• Right-hand thread direction, 3.5xD flute-by-diameter ratio for chip clearance considerations in thread forming

Compatibility

Designed as an OEM-style replacement and production tap for applications requiring 10-32 UNF internal threads in steel, stainless steel, cast iron, non-ferrous, and heat-resistant alloy workpieces, consistent with material application codes P, M, K, N, and S.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from cutting tap drill sizes - consult the appropriate forming tap drill chart for the 10-32 UNF specification before drilling. Use a suitable tapping fluid or cutting oil to aid the forming process and protect the coating. Always secure the workpiece and set tapping machine speed to the recommended surface footage for High-Speed Steel taps on the target material. Discontinue use if the tap shows signs of galling or excessive torque buildup.