A percussion instrument includes a mainframe having a bottom part defining a lower surface. A head is tensioned over an inner part of the mainframe. A hoop structure is arranged over the outer periphery of the head and applies tension to the head. The hoop structure has a lower surface provided with a plurality of recesses. Female threaded connector parts are contained within the recesses. A plurality of bolts extend through the bottom part of the mainframe and engage the female threaded connector parts, to affix the hoop structure to the mainframe. The bolts extend into the bottom part of the mainframe, such that exposure of the bolts on the upper surface side of the hoop structure can be avoided.