according to a preferred embodiment , a multi - piece fastener with self - indexing nut is disclosed . the multi - piece fastener is designed for use in low clearance areas such as aircraft wing side - of - body joint locations . the multi - piece fastener comprises a stud comprising an elongated part extending between a first end face and a second end face , a threaded head fastener , a threaded tail fastener , and a wrenching feature . a self - indexing feature is provided on the stud and head fastener which allows automatic orientation of the head fastener with respect to the stud .