What is commonly used to fasten metal parts together when welding is insufficient?

Rivets are commonly used to fasten metal parts together in situations where welding may not be sufficient or practical. This fastening method involves driving a metal pin through the parts to be joined and then deforming one end of the pin to create a strong connection. Riveting is particularly advantageous in scenarios where the integrity of the materials must be maintained without the introduction of heat, which can alter properties or create distortions in the metals involved.

This method is especially prevalent in industries like aviation and construction, where it offers benefits such as resistance to vibration and movement. Riveting can provide a reliable and durable bond, making it ideal for applications where the materials need to remain distinct or where welding would be ineffective due to accessibility or heat transfer concerns.

While nuts, bolts, and washers are all important components in fastening, they typically serve different purposes. Nuts and bolts are often used together for creating adjustable joints where disassembly may be needed, and washers are primarily used to distribute pressure and prevent damage to materials but do not function as fastening components on their own. Therefore, for scenarios where welding is inadequate, rivets are the preferred choice.