| 摘要 |
The invention relates to a device (1; 20; 51) for assembling pre-bored (15) elements (2; 3), the elements together having a reference thickness (18) that may vary up to an actual maximum thickness (40), the device comprising a male element (4; 21; 52) comprising a shank (6; 22; 54) extending in a thread (11; 27) or swaging grooves (59), an external surface (12; 28; 60) having a height (13; 61) equal to a height (14) of the shank, chosen so as to correspond to at least the actual maximum thickness (40) of the elements to be assembled, characterized in that the external surface has a visual reference mark (16; 35; 63), located at a distance (17) of a lower limit (9; 34; 57), or extending over a distance (17) from a lower limit up to an upper limit (42A; 42B; 65) toward the head. |
