Seco 10139679 M6 Straight Flute Tap 3 Flutes Hss-e Tn Coated

Product Description

The SECO 10139679 is a straight flute machine tap designed for threading blind holes in a range of metal materials. Built from High-Speed Steel-E (HSS-E) with a TN coating, it handles demanding threading operations in steel, stainless steel, cast iron, and non-ferrous metals. The M6 metric thread size pairs with a 1.00 mm pitch and a 6H class of fit, making it suitable for standard metric fastener applications. The semi-bottoming chamfer allows threading closer to the bottom of a blind hole without fully bottoming out. Licensed machinists and tool-and-die professionals are the primary installers of this tap in production and repair settings.

The 10139679 is rated for blind hole threading across a wide variety of metal workpieces. Its 18.00 mm thread length and 30.00 mm tapping depth accommodate typical M6 blind-hole requirements in both production machining and maintenance-repair operations. The Series T32 designation places it within SECOs straight flute tap family, which is commonly selected for materials that produce short, broken chips rather than long stringy ones. This tap is appropriate for vertical and horizontal machine tapping applications in general fabrication, toolroom, and MRO environments.

Key Features

• HSS-E construction provides increased toughness and wear resistance over standard HSS
• TN coating reduces friction and extends tool life in ferrous and non-ferrous metals
• Semi-bottoming chamfer enables threading near the bottom of blind holes
• 6H class of fit meets standard metric tolerance requirements for general-purpose threaded assemblies
• Straight flute geometry promotes chip breaking in short-chip materials such as cast iron and harder steels
• No coolant-through design suits conventional flood coolant or cutting fluid application

Compatibility

Designed for blind hole threading in steel, stainless steel, cast iron, and non-ferrous metals requiring M6 metric threads at a 1.00 mm pitch with a 6H class of fit.

Installation Notes

This tap is intended for use in a machine tapping setup operated by a qualified machinist. Secure the tap in a proper tap holder or rigid tapping chuck matched to the 6.00 mm shank diameter before operation. Always verify spindle speed and feed rate are appropriate for the workpiece material before engaging the tap. Use adequate cutting fluid or flood coolant to prevent galling, especially when threading stainless steel.