The Dormer E003 M4 Spiral Flute Tap is designed for creating M4 metric coarse threads in blind holes, a popular small thread size used extensively in electronics, control panels, light engineering, and small mechanical assemblies. This versatile tap is suitable for both professional precision work and DIY projects requiring accurate small threads. M4 threads are one of the most commonly encountered small thread sizes, frequently specified in electrical enclosures, instrument housings, light brackets, small machinery, and computer equipment. The spiral flute configuration efficiently removes chips upward from blind holes, which is crucial for preventing the tap breakage that can easily occur at smaller diameters if chips accumulate. With 3 flutes and a 7mm threading length, this tap covers most M4 applications. The High Speed Steel Cobalt construction ensures the tap maintains sharp cutting edges for producing clean, precise threads in steel and cast steel materials. The steam tempered surface coating helps retain cutting fluid, reducing friction and the risk of tap breakage during operation. The cylindrical shank with square drive provides positive engagement with tap wrenches for controlled threading. Features and Benefits: • M4 thread size commonly used in electronics and light engineering • Spiral flute design prevents chip accumulation in blind holes • 7mm threading length suitable for most M4 applications • HSS-E cobalt material for durability and precision at small diameters • Steam tempered coating improves cutting fluid retention Specifications: Diameter: M4 Type: Spiral Flute Shank: Cylindrical shank with Square Premachined hole diameter - millimeter (PHD): 3.3mm Connection diameter - millimeter (DCON MS): 4mm Threading length - millimeter (THL): 7mm Basic standard group (BSG): ISO 529 Thread diameter size (TDZ): 4 Hand (Cutting direction): Right Material code (BMC): High Speed Steel Cobalt Thread form (THFT): M - Metric coarse Flute count (NOF): 3 Alt Part

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