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Left hand 30 degrees
Special tip setting eliminates sticking
ISO40 Shank/arbor to fit BHC Boring heads
Graduation lower edge: 0
1/2" UNF HSS L/H Taper Tap FlngC5/16x1.1/4Z Left hand 30 degreesFor producing precision Left Hand threads by hand tapping, for starting threads either second or bottoming taps should used after to achieve desire thread depth. General purpose use Suitable for materials up to 1000N mm2 Through & blind holes Suitable for both hand and machine operations Threads per inch 20 Overall length 89mm Cutting length 29mm Drill diameter 11. 5mm
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