interrupted screw

noun

1. a screw having the thread interrupted in one or more places by longitudinal channels, as in the breech of a cannon or the lead screw of a lathe.

interrupted screw

noun

1. a screw with a slot or slots cut into the thread, esp one used in the breech of some guns permitting both engagement and release of the block by a partial turn of the screw

Example Sentences

The system of breech closing is that of the interrupted screw, which presents four sectors, two of them threaded and two plain, so that the breech is opened or closed by a quarter revolution of the screw.

From Project Gutenberg