discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 59.50
freight :USD$7.00,(Postal parcel)
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(spiral fluted tapEX-SFT）
Remarks1：EX-SFTThe standard of conventional blind, but also through hole.
Remarks2Standard: standing inventory, spiral screw and straight groove screw is different, the ordinary straight groove groove silk attack line type, and the spiral screw is a screw type. Spiral screw in tapping, to increase its rotation of the spiral groove, can easily cut iron from the hole, so as to avoid iron residue or blockage in the trench, caused by tapping broken edge crack, so it can increase the life of wire tapping and cutting out the thread of the highest precision. Spiral screw is suitable for cutting materials with high toughness, and is not suitable for cast iron scraps into fine materials.
Remarks3Tap: precision grade:OSG/TOSG OHClass:OH2。
Remarks4Material: silk attack:HSS-E。
Remarks5Cutting edge: eat the teeth:2.5Tooth.