Drum hardware refers to the parts of a drum or drum kit that are used to tension, position, and otherwise support the instruments themselves. Occasionally, the hardware is used percussively as well (as in the rim shot).
A drum

Drum

The drum is a member of the percussion group of musical instruments, which is technically classified as the membranophones. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a shell and struck, either directly with the player's hands, or with a...

 "hoop" or "rim" may be made of metal, wood, or other materials and is used to hold a drumhead

Drumhead

A drumhead is a membrane stretched over one or both of the open ends of a drum. The drumhead is struck with sticks, mallets, or hands so that it vibrates and the sound resonates through the drum.-History:...

 against a drum shell, either with bolts through metal "claws" attached directly to a hoop, or bolts through holes in a flange

Flange

A flange is an external or internal ridge, or rim , for strength, as the flange of an iron beam such as an I-beam or a T-beam; or for attachment to another object, as the flange on the end of a pipe, steam cylinder, etc., or on the lens mount of a camera; or for a flange of a rail car or tram wheel...

d rim.