Patent ID: 8087861

Claim:
A plate member fastener for fastening to a mounting through hole of a first metal plate member and a screw hole of a second metal plate member to join said first metal plate member and said second metal plate member together, the plate member fastener comprising: a barrel, said barrel having an inside accommodation space extending through top and bottom sides thereof, a step located on the inside thereof around said inside accommodation space, a bottom extension tube axially forwardly extended from the bottom side around a bottom opening thereof and fitted into the mounting through hole of said first metal plate member, and a solder mask covered on said bottom extension tube; a screw member, said screw member having a head, a shank perpendicularly extended from a bottom wall of said head for insertion through the mounting through hole of said first metal plate member, a thread spirally extending around the periphery of said shank for threading into the screw hole of said second metal plate member, and a shoulder connected between said head and said shank; a cap fixedly fastened to the head of said screw member, said cap having a center opening axially extending through top and bottom sides thereof for receiving said barrel, said screw member and said spring member; and a spring member received inside said barrel and stopped between the step of said barrel and the head of said screw member to impart an outward pressure to said cap relative to said barrel.