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Hand taps manual tapping screw tooth taper of two GB 2 Pack alloy tool material

discount 70% in 2018-09-21 to 2018-09-23
price: USD$ 23.10
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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3-20mm hand tap tap tap tapping hole manual GB thread alloy tool material

Material: alloy tool steel

The price of a 2 price (i.e. two cone and cone)

Hand taps small knowledge:

Generally speaking, hand taps a specification has two branches, one of which is called a cone, or a cone, another one is the two cone, a cone head is that some sharp, the upper half conical teeth a bit thinner, first with the tap tapping processing. Is the first rough machining into semi-finished products, and then with the addition of a tapping, the kind of standard after the completion of what you want. The big cone and cone size difference is more obvious, the small size 2,3,4mm difference is small, can be directly used two cone tapping thread products. Please use the tap wrench screw clockwise three laps when tapping, then counterclockwise twist a circle (chip effect), so repeatedly, until the completion of tapping.