such that they rest against each other when the components 1 2 are combined the locking elements 7 8 are engaged with each other the locking elements 7 8 are formed over the entire length of the longitudinal and or narrow sides of the components 1 2 as shown in fig3 on at least one tongue wedge area 11 a projection 7 is formed which is received by the recess 8 in the adjacent groove face area 9 when the tongue 6 is inserted into the groove 5 the two groove faces 3 4 are moved apart elastically the cross section of the projection 7 and the recess 8 is triangular and the triangular side 17 closer to the groove opening is shorter and more sharply inclined than the triangular side 18 closer to the groove base 10 when the tongue 6 is inserted into the groove 5 the longer side 18 of the projection 7 slides on the inner side u2014 or a beveled section formed in this area u2014 of the front edge of the groove face 3 until the projection 7 has overcome this inner edge 25 and is received by the recess 8 to make the connection it is advantageous if the triangle side 18 close to the groove base is four to eight times ideally five to seven times as long as the triangle side 17 away from the groove base and if the angle between the two triangular sides 17 18 is between 100 u00b0 and 140 u00b0 specifically 110 u00b0 and 130 u00b0 to facilitate insertion it is advantageous if the terminal edges of the tongue 6 lying on the inside are provided with a beveled section and or the inner terminal area of.