Injection molded rivet-style fastener and housing with snap assembly functionality along with an injection molding process for producing such a rivet without an undercut feature

A fastener assembly, comprising:

• an engaging portion having a projecting stem which is interiorly hollowed between an upper edge and a solid end most extending portion;
• a receiving portion having a surface within which is configured an inner rim edge;
• and
• a diameter of an aperture defined by said rim edge being less than a diameter of an inserting portion of said stem so that, upon pre-passage of said solid most extending portion, an intermediate hollowed interior portion exhibiting a controlled collapse against said rim edge to affix said engaging portion to said receiving portion.

A fastener assembly, comprising:

• an engaging portion having a projecting stem which is interiorly hollowed between and upper edge and a solid end most extending portion;
• a receiving portion having a surface within which is configured an inner rim edge, said inner rim edge further having a chamfered shape terminating in a narrowed rim profile;
• and
• a diameter of an aperture defined by said rim edge being less than a diameter of an inserting portion of said stem so that, upon pre-passage of said solid most extending portion, an intermediate hollowed interior portion exhibiting a controlled collapse against said rim edge to affix said engaging portion to said receiving portion.