Universal plug

A plug for use in securing a screw in a previously formed hole in a workpiece comprising

• a head portion having an enlarged flange adapted to engage the workpiece and a cylindrical portion
• a cylindrical tail portion of substantially the same external diameter as the cylindrical portion of the head portion
• four legs interconnecting the tail portion and the head portion
• a substantially uniform bore extending through the head portion and the four legs to the tail portion
• characterized in that
• the tail portion being provided with screw engaging projections having a central bore of lesser diameter than the substantially uniform bore
• the four legs being identical with each other in shape and each comprising
• a first flexing portion of reduced thickness adjacent the cylindrical portion of the head portion
• a second flexing portion of reduced thickness adjacent the cylindrical tail portion
• a third flexing portion of reduced thickness approximately mid way between the first and the second flexing portions
• the thickness of the leg increasing radially of the plug and decreasing transversely of the radial direction between the first flexing portion and the third flexing portion and between the second flexing portion and the third flexing portion, the overall outer diameter of a central portion of the four legs being slightly greater than the outer diameter of the cylindrical portion of the head portion.