A tool used to insert a stud bolt which consists of a metal block that, by means of a threaded hole running through it, can be attached to the bolt and then turned with a wrench.
Origin
Mid 19th century.
Definition of stud box in US English:
stud box
noun
rare
A tool used to insert a stud bolt which consists of a metal block that, by means of a threaded hole running through it, can be attached to the bolt and then turned with a wrench.