Abstract: A fastening system includes a bolt having a head, a shaft member defining an axis of rotation, and a locking member with wings. The bolt is insertable into a receiving hole formed in a surface, wherein upon rotation of the bolt from an initial orientation to a second orientation, the wings engage with underside surfaces of the receiving hole to prevent withdrawal. A locking mechanism is insertable through aligned holes in the shaft member after rotation to prevent both rotation and removal of the bolt. The locking mechanism may be configured for removal from either an interior side or exterior side of the surface. The system enables secure connections that can be easily assembled and disassembled while supporting objects between the bolt head and surface.