Alpha HSS Tap UNC Intermediate 1/2x13 UNCHI121 2x13 INTERMEDIATE taps have a lead of four threads and are used in most general purpose applications. Alpha Intermediate taps can be identified by the two rings on the shaft near the driving square. Diameter: 1 2mm Pitch: 13mm Overall length: 75mm Shaft Diameter: 9mm Drive Square: 7mm Tapping Drill Size: 10. 75mm Weight (gr) 50. 00
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