Plastic Product With Insert

A device for joining a first part to a second part comprising:

• an insert with a longitudinal body, an outer surface of said longitudinal body including male threads;
• an annular flange on one end of said longitudinal body, wherein said annular flange has an inner and outer circumference, the inner circumference defined by an intersection between said longitudinal body and said annular flange;
• a hole in a center of said longitudinal body, said hole including female threads;
• protrusions and recesses on said annular flange, wherein said protrusions and recesses extend inward along an axial direction of the annular flange, between the inner circumference and the outer circumference of said annular flange;
• wherein said protrusions and recesses alternate in a radial pattern around the annular flange;
• an opening in said first part, said opening comprising a hole and a counter bore hole;
• said counter bore hole including recesses and protrusions, said recesses and protrusions alternating in a radial pattern around the counter bore hole;
• and
• wherein said insert is threaded into said opening in said first part, wherein said recesses and protrusions on said annular flange of said insert interlock with said recesses and protrusions in said counter bore hole in said opening, and wherein said interlock inhibits the insert from over-rotating in the opening.

A method for attaching a blow molded plastic part to another part comprising:

• providing an insert, the insert comprising a longitudinal body with external threads and a threaded hole, the insert comprising an annular flange on one end of the longitudinal body, the annular flange comprising protrusions and recesses, wherein the protrusions and recesses alternate in a radial pattern around the flange
• providing a plastic part, the plastic part comprising an opening, wherein the opening includes a threaded portion and a counter bore portion, the counter bore portion including protrusions and recesses, wherein the protrusions and recesses alternate in a radial pattern around the counter bore hole,
• inserting the insert into the opening in the plastic part,
• turning the insert within the plastic part until the protrusions and recesses on the annular flange interlock with the protrusions and recesses in the counter bore hole;
• and
• attaching a second part to the plastic part with a threaded fastener, wherein the threaded fastener is threaded into the threaded hole in the longitudinal body of the insert.

A method for attaching a blow molded plastic part to another part comprising:

• providing an insert, the insert comprising a longitudinal body with external threads and a threaded hole, the insert comprising an annular flange on one end of the longitudinal body, the annular flange comprising protrusions and recesses, wherein the protrusions and recesses alternate in a radial pattern around the flange
• providing a plastic part, the plastic part comprising an opening,
• inserting the insert into the opening in the plastic part,
• turning the insert within the plastic part until the protrusions and recesses on the annular flange interact with plastic part.
• attaching a second part to the plastic part with a threaded fastener, wherein the threaded fastener is threaded into the threaded hole in the longitudinal body of the insert.