Classes of Fasteners Removable Fasteners Be easily removed with hand tools and without damaging any parts. Such as nuts and bolts Permanent Fasteners Installed permanently in place Not be removed for routine maintenance work.Such as Rivets. Introduction to Engineering7 Introduction to Engineering Classes of Fasteners Installed permanently in place Not be removed for routine maintenance work. Such as Rivets. Removable Fasteners Permanent Fasteners Be easily removed with hand tools and without damaging any parts. Such as nuts and bolts