The metal pieces that are mounted to the shell of the drum are called the "Mounting Lugs".
The bolts that go into them are called "Tension rods".
Usually there is a washer and a "Claw Hook" that the tension rod goes through which fastens to the "Hoop" or "Rim" which holds the drum head to the drum, and tunes it.
Normally on a production line, shells rolled glued and finished. Drilled for all fittings, fittings added tension lugs and mounting brackets for tom toms, drum head, hoop then tension roads. All shells will under go the same with variations of bass drum has spurs and tom-tom holder bracket, Floor tom tom has leg brackets. Snare drum with have snare strainer added.
The external auditory meatus is the ear canal that allows sound waves to pass from the external environment to the tympanic membrane (ear drum).
The drum should measure 23 inches diameter 36 inches height These are all external measurements.
A 55-gallon drum can hold approximately 55 gallons of water when empty. This volume is equivalent to about 208 liters. However, the actual volume may vary slightly depending on the drum's design and any internal fittings. Always ensure the drum is clean and suitable for storing water.
outer ear
The tympanic membrane or ear drum and the external auditory meatus
The shells are normally made of plywood, rolled through a machine to make a cylinder shape, then glued and a coating applied (coloured finish). Some drum kits are made of acrylic (see through). The snare drum if not made of plywood is sometime made of metal, Steel, brass, copper alloy. Fittings and hardware are normally metal.
It is just between your external ear and your middle ear.
Pex fittings are used for making connections in PEX plumbing applications. Professiomnal plubmers used next type of PEX fittings: Crimp fittings, Clamp fittings, Push Up fittings, Sharkbite fittings and others.
Red Brass piping schedule 40 with TP copper fittings and brazed joints Ans 2 - PEX piping with brass fittings is far more long lasting and cheaper to install than any copper - ( the above answer could only be from a plumbing company trying to drum up business )
The different types of water heater fittings available in the market include compression fittings, solder fittings, push-to-connect fittings, and threaded fittings. These fittings are used to connect pipes and components in water heater systems.
Tapped fittings are plumbing components that have internal threads, allowing them to be connected to pipes or other fittings with matching external threads. They are commonly used in various applications, including water supply and gas systems, to create secure and leak-free connections. Tapped fittings come in various shapes, such as elbows, tees, and couplings, and are typically made from materials like brass, steel, or PVC. Their design facilitates easy assembly and disassembly, making them practical for repairs and modifications.