Method of installing spiral threaded inserts and installation tool

摘要

In a method of installing spiral threaded inserts ( 38 ), in which method a first threaded insert ( 38 ) is inserted into an installation tool ( 20 ) and is screwed into a tapped hole by the installation tool ( 20 ), safe use is achieved even at locations where access is difficult by virtue of the fact that the first threaded insert ( 38 ) is secured in the installation tool ( 20 ) to prevent it from falling out.