Cone expansion wall-plug

A cone expansion wall-plug, comprising:

• a shank having first threaded means defined upon one end portion thereof;
• an expansion cone having second threaded means provided thereon for threaded engagement with said first threaded means of said shank such that when said shank is rotated, said threaded engagement of said first and second threaded means will cause said expansion cone to undergo translational movement relative to said shank;
• and
• an expandable socket disposed about said shank and including an expansion zone for cooperation with said expansion cone such that when said expansion cone undergoes said translational movement, said expansion cone will cause expansion of said expansion zone of said expandable socket,
• said expandable socket being formed from a sheet metal blank and including means defining a bend line within the region of an end portion thereof which is operatively cooperable with said expansion cone;
• a plurality of expansion lugs bent about said bend line so as to extend in a first direction relative to said bend line and thereby define said expansion zone within said expandable socket;
• and a plurality of expansion teeth extending from said bend line in a second direction, relative to said bend line, which is opposite to said first direction in which said expansion lugs extend, such that free end portions of said expansion teeth, located at an axial extremity of said expandable socket, operatively engage said expansion cone for thereby guiding said expansion cone into said expansion zone of said expandable socket as said expansion cone undergoes said translational movement relative to said shank and said expandable socket as a result of said threaded engagement of said first and second threaded means of said shank and said expansion cone.