The steel bar straight screw thread connector adopts frank whorl connect new technology, and it is a kind of robotistic steel bar which can bear two kind of working force. It is sacred from the restriction that whether it has decorative design or whether it has carbon content. It is in favor of the weldability discrepancy. Even the steel bar connection which was not permitted can be connected with equal diameter steel bars and different diameter steel bars. We can produce it in advance, and it has a quick connecting speed. It has good aim connection capacity and the technique is sample, reliable and safe without open flame work and environment pollutions. It can also save raw steel material and energy. We can work on 24 hours with whole weather. It proves obvious benefit in technology, economy and also for society.
