noun
: a bolt used in the repair of boilers and of ships with hulls of steel plate that has a countersunk head with a square knob which is twisted off when the bolt is screwed home
noun
: a bolt used in the repair of boilers and of ships with hulls of steel plate that has a countersunk head with a square knob which is twisted off when the bolt is screwed home
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012