Captive washers are used with tension control devices on a drum having a
drum shell, two drum hoops, two drumheads and multiple tension control
devices. Each tension control device is mounted on the drum shell and has
a mounting post, a connector and two adjusting bolts. Each captive washer
presses against the drum hoop and has a flange, a lip, an annular groove
and a through hole. The annular groove is formed between the flange and
the lip and is mounted securely in an elongated groove in the drum hoop
to hold the captive washer in the drum hoop. The through hole extends
longitudinally through the captive washer.