The die clamping screw arranged on the upper die can not loose, the die clamping is convenient, the die can be clamped well by directly screwing the bolt, and the production efficiency is high.
本发明合模螺丝装在上模上不会松脱，合模方便，直接拧紧螺栓就可以合好模具，生产效率高。
2
The high-strength right-screwing threaded steel bolt is formed by full thread reinforcing bars and cast steel nuts.