Can You Use Any Bolts for Battery Terminal?

Bolt sizes vary depending on the battery terminals. Fortunately, picking up new bolts for your car’s battery terminals is easy when you know where to start. For now, you must ensure that you have all the necessary tools and equipment before you begin. Further exploration will reveal whether or not any bolts size can be used for the battery terminal.

You might have assumed will any bolt work for battery terminal. You can use any bolt as long as it has the same thread size and length. It doesn’t matter if you’re looking for stainless steel bolts or just regular old-fashioned ones. Either one will work just fine.

The most common bolt type is hex head bolts, which you may find in hardware stores or home improvement stores like Home Depot. They typically come in a range of sizes (1/4 inch to 1-inch), but the size you need will depend on the make and model of your car. For example, if you have a Chevrolet Camaro, then you would use an 8mm bolt; for Toyota Prius 5th generation, 10mm bolt; Ford Thunderbird 1966-1970 12mm bolt; etc.

The first bolt that goes into a car battery is on top of the hold-down mechanism, which is part of your vehicle’s frame or engine block. These have standard hex heads and will work with any bolt you may try to use, as long as it fits inside the hole.

Next, you have the bolts on top of your battery cables. These are hexagonal with 12 sides and will not fit into a regular bolt hole provided by an electrical component or even most other batteries on the market today.

You can also use a bolt with 12 sides if it is long enough to reach through your hold-down and all of your cable connections. If you do not have one available, ensure you get one with threads on both ends.

What size bolt is used for the battery terminal?

The bolt on battery terminal is a standard automotive battery terminal used in many applications, including cars, boats, RVs, and more. However, what kind of bolts to use on battery terminals is the most frequently asked by many people. As such, there are different battery terminal types. The size of the bolt depends on what kind of terminal or connector you use. If your battery is in good shape with no cracks, then it’s fine. It might not last long if you use a new bolt too big for the terminals because they will loosen quickly and not hold much charge.

Specifically, it’s part of the terminal assembly that connects to the negative post on the battery—commonly used in automotive batteries and other large energy converters. They are also known as carriage bolts or round-head machine screws. It holds wire until it is tight enough to function properly with little resistance between them since they have no friction compatibility with metal objects.

What kind of metal are battery terminals?

Battery terminals are made of various metals. Depending on the manufacturer, these include brass, steel, nickel plating, etc. You can use an alloy like aluminum if it doesn’t damage your battery or vehicle wiring system. The bolt size depends on how much a current flows through your connection. If the amperage is too high, the bolt can heat up and damage your battery terminal.

What metal is best for battery terminals?

The most common metals for battery terminals are the following:

  • Stainless Steel. This is the most durable of all three metals, which makes it more expensive.
  • Brass. It is used for battery terminals because it’s less expensive than stainless steel and has good electrical conductivity; however, over time, brass will corrode.
  • Nickel. It is a good choice for battery terminals because it’s not as conductive as brass or steel, which means there will be less danger of corrosion. It can also resist currents that would corrode other metals.
  • Copper. It is also a good option for battery terminals because it’s the best conductor of electricity.
  • Aluminum. This is not recommended, as it can corrode quickly and create excessive heat that could damage your car/battery.


Bolt sizes vary depending on the battery terminal. The best way to find out what you need is by contacting your manufacturer or a local automotive parts store in person. Picking up new bolts for your car’s battery terminals isn’t hard when you know where to start. If you’re just looking for some spare parts in case something goes wrong with your current ones, there are many types available online that will work well as replacements.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.