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The GUHRING 9039420050000 is a thread forming tap designed for M5x0.80 metric coarse internal threading in blind and through-hole applications. Built from High-Speed Steel-E-CO (cobalt-grade HSS), this Series 3942 tap features a TiCN coating for improved wear resistance and reduced friction during the cold-forming process. With a modified bottoming chamfer of 2-3 threads, it produces clean, strong internal threads without generating chips. The overall length is 2.382 inches and the thread length is 0.5118 inches. Right-hand thread direction. This tap is suited for use by machinists, toolroom technicians, and maintenance professionals requiring precise metric threading in production or repair environments.
This tap is rated for use in steel, stainless steel, cast iron, and non-ferrous metals, covering material application codes P, M, K, and N. It is well suited for both blind hole and through-hole threading operations at a 3xD flute-by-diameter ratio and a tapping depth of 0.9449 inches. The 6HX class of fit with thread limit D7 and D8 supports standard metric tolerance requirements in production machining and field maintenance scenarios.
Designed for M5x0.80 metric coarse thread forming in steel, stainless steel, cast iron, and non-ferrous metals. Suitable for use in any tapping application requiring a 6HX class of fit with D7 or D8 thread limit tolerance.
Thread forming taps should be installed by qualified machinists or toolroom technicians familiar with cold-forming tap geometry and machine setup. Always use the appropriate cutting fluid or tapping oil recommended for the workpiece material before starting the operation. Ensure the tapping machine or CNC spindle is properly synchronized to the thread pitch to avoid tap breakage. Do not use this tap in pre-drilled holes undersized for thread forming — consult the tap manufacturer drill chart for the correct forming drill diameter.
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