Patent ID: 8915687

Claim:
A self-drilling bolt and nut assembly comprising: a fastener having a proximal end and a distal end and comprising a head at the proximal end including an integral washer and a shank extending from said head to a drill tip and having spaced threaded portions, said drill tip have a terminus at said distal end; a plate mounted to said shank and having an upper recess dimensioned to receive said washer and having a lower surface with a plurality of projections; and a nut having an exterior surface configured for applying or resisting a torque and an axially extending internal threaded surface threadably engageable with said fastener and having a first end defining an opening for inserting said fastener and an axially spaced opposite second end having a cap comprising an elongated portion and a closed end and entirely enclosing said drill tip and terminus, and defining a window between said first and second end and positioned at an intermediate axial position of said internal threaded surface, said first end having a plurality of projections.