Parts suppliers are companies that provide components and materials needed for manufacturing and assembly in various industries, such as automotive, electronics, and machinery. They play a crucial role in the supply chain by ensuring that manufacturers have the necessary parts to produce their products efficiently and on time. These suppliers can offer a wide range of items, including raw materials, mechanical components, and electronic parts. They often work closely with manufacturers to understand their needs and may provide additional services like inventory management and logistics support to streamline the production process.