the cruciform column 60 along with its supporting elements 62 and 64 the head portion 70 therefore is defined by a curvilinear nose and a pair of depending arms 80 and 82 which are capable of deflection towards one another additionally the tapered column 60 is deflectable in substantially all directions as in precession along its axis with the supporting elements 62 and 64 insuring that the head 70 to be in an oriented relationship relative to the axis of the fastener 14 the head 70 with its dependent arms 80 and 82 has a curvilinear surface that is greater in extent than 180 u00b0 and a diameter that is substantially equal to the diameter of bore 38 but greater than the predetermined diameter of the annular ring or shoulder 40 in the operation of the present device the first portion 50 of the male stud 14 is inserted into a bore 90 that is slightly smaller in diameter than the diametrical extent of the wings 52 as can best be seen in fig3 the insertion of the rigid stud 50 with its wings 52 into the bore 90 of speaker cabinet 22 results in a deflection of the wings 52 and a secure fastening in cabinet 52 the female element is introduced into a complementary bore 92 in the frame of grille 16 with the shouldered annular rings.