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American YAMAWA import lengthened spiral screw cone UNC4-406-328-321/4-100-150

price:USD$83.00
discount 70% in 2018-09-23 to 2018-09-25
price: USD$ 58.10
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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Spiral taps for YAMAWA long shank deep holes:

Deep hole with spiral screw specially designed for tapping the length of wire diameter of 2 or 2 times

Tapping holes above. The length of the tooth of S-SP is shorter than that of the ordinary spiral wire,

But the helix angle is bigger than the ordinary spiral wire. In order to reduce the friction resistance produced during cutting,

And the growth of the wire attack life.

Brand: YAMAWA spiral wire attack

Total length: 100L-150L