Alpha HSS Tap MC Bottoming-20x2.5 MCHB200BOTTOMING taps have a lead of two threads and are used when tapping blind holes. Usually preceded by a taper or intermediate tap. Alpha bottoming taps can be identified by their plain shaft, they have no rings on the shaft near the driving square. Diameter: 20mm Pitch: 2. 5mm Overall length: 95mm Shaft Diameter: 16mm Drive Square: 12mm Tapping Drill Size: 17. 50mm Weight (gr) 140. 00
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