Alpha HSS Tap UNF Bottoming 8Gx36 UNFHB8G8Gx36 BOTTOMING 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: 8mm Pitch: 36mm Overall length: 45mm Shaft Diameter: 4. 5mm Drive Square: 3. 4mm Tapping Drill Size: 3. 50mm Weight (gr) 10. 00
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