Rotation resistance device for a bolt of a tightening device of a drum head

A device for tightening a drum head and setting the tension of the drum head on a drum body, the device comprising:

• a drum body having an open end over which a drum head is to be placed;
• a drum hoop supported on the drum body at the open end and movable along the drum body to pass the open end, the hoop including means for engaging a drum head at the drum body open end for tightening the drum head as the drum hoop is moved a short distance along the drum body;
• a lug secured to the drum body, the lug having an opening therein generally in the direction along the drum trunk;
• a lug nut in the lug opening, the lug nut having an external periphery in the opening in the lug, means holding the lug nut in place to the lug, the lug nut having a bolt receiving opening therein, the bolt receiving open being at least partially screw threaded, the bolt receiving opening extending generally along the drum body and away from the open end;
• a drum head tension setting and adjusting bolt, the bolt including means for engaging the drum hoop at the open end of the drum body for holding the drum hoop to the drum body, the bolt having a shank which is cooperatingly screw threaded to the threaded part of the opening in the lug nut, and the bolt being tightenable into the bolt receiving opening of the lug nut, the tightening of the bolt moving the means engaging the drum hoop for moving the hoop to tension and fix the drum head to the drum body over the open end of the drum body;
• a radial opening through the lug nut from the periphery of the lug nut to the bolt receiving opening;
• a bolt rotation resisting chip comprised of an elastic body and disposed in the radial opening in the lug nut, the chip including a radially outer side, which contacts the lug at the inside of the lug opening, the chip including a radially inner side which directly engages the shank of the bolt in the bolt receiving opening in the lug nut for resisting the rotation of the bolt in the bolt receiving opening.