螺旋牙根梃，螺旋起子

hexagonal screw

electric screw driver【机】

lead screw cutting lathes【机】;lead screw lathe【机】;lead screw turning machine【机】

screw conveyer for distributing matrices, spaces in composing machines

propulsion with ground-engaging cylindrical screw drives

kneading screw (kneading worm)

screw-plug fuse

regular screw threads