упор; стопор; арретир; фиксатор; защёлка
имя существительное [технический термин] стопор, защёлка, собачка; арретир, предохранитель Синоним(ы): stop, locking device
noun Etymology: French détente, from Middle French destente, from destendre to slacken, from Old French, from des- de- + tendre to stretch, from Latin tendere — more at thin a device (as a catch, dog, or spring-operated ball) for positioning and holding one mechanical part in relation to another in a manner such that the device can be released by force applied to one of the parts