Classification opinions
… consisting of : (i) a steel round-head stud with a cotter-pin hole in the shank; (ii) an unhardened vulcanised … semi-helicoidal paths terminating in locking slots; (iv) a cotter-pin which is inserted in the stud shank, compresses … turned across the cam, and locks the complete device by fitting into the slots; used, inter alia, for fixing …