An insert configured to be installed in a bore of a sandwich panel , the sandwich panel comprising a first skin , a second skin opposite the first skin , and a core therebetween; the insert comprising: a panel-engaging structure configured to engage one of the first skin and the second skin of the sandwich panel when the insert is installed in the sandwich panel ; an opposing end opposite the panel-engaging structure ; a body disposed between the panel-engaging structure and the opposing end , the body being configured to engage the core of the sandwich panel when the insert is installed in the sandwich panel , the body having a hole formed therein, the hole extending from the panel-engaging structure into the body and towards the opposing end ; a retention feature configured to retain the insert in the sandwich panel without the use of adhesives, at least a portion of the retention feature being configured to be positioned between the first skin and the second skin of the sandwich panel when the insert is installed in the sandwich panel ; and an anti-rotation feature configured to prevent rotation of the insert with respect to the sandwich panel , wherein the anti-rotation feature is configured to resist rotation of the insert with respect to the sandwich panel , about a longitudinal axis of the hole , wherein the insert is configured to receive a secondary object within the hole , the secondary object being configured to transfer a localized load to the sandwich panel via the insert ; and wherein the anti-rotation feature of the panel-engaging structure comprises at least one extension extending from a primary perimeter of the panel-engaging structure , wherein the at least one extension is configured to be positioned adjacent one of the first skin and the second skin when the insert is installed in the sandwich panel and said at least one extension is configured to deform a portion of the first skin as the insert is rotated within the bore or to deform a portion of the second skin as the insert is rotated within the bore . a panel-engaging structure configured to engage one of the first skin and the second skin of the sandwich panel when the insert is installed in the sandwich panel ; an opposing end opposite the panel-engaging structure ; a body disposed between the panel-engaging structure and the opposing end , the body being configured to engage the core of the sandwich panel when the insert is installed in the sandwich panel , the body having a hole formed therein, the hole extending from the panel-engaging structure into the body and towards the opposing end ; a retention feature configured to retain the insert in the sandwich panel without the use of adhesives, at least a portion of the retention feature being configured to be positioned between the first skin and the second skin of the sandwich panel when the insert is installed in the sandwich panel ; and an anti-rotation feature configured to prevent rotation of the insert with respect to the sandwich panel , wherein the anti-rotation feature is configured to resist rotation of the insert with respect to the sandwich panel , about a longitudinal axis of the hole , wherein the insert is configured to receive a secondary object within the hole , the secondary object being configured to transfer a localized load to the sandwich panel via the insert ; and wherein the anti-rotation feature of the panel-engaging structure comprises at least one extension extending from a primary perimeter of the panel-engaging structure , wherein the at least one extension is configured to be positioned adjacent one of the first skin and the second skin when the insert is installed in the sandwich panel and said at least one extension is configured to deform a portion of the first skin as the insert is rotated within the bore or to deform a portion of the second skin as the insert is rotated within the bore . <EOS>