Bolt: A threaded fastener typically used with a nut to join materials together, providing secure and tight connections.
Nut: A hexagonal or square component that pairs with a bolt to secure components, typically by threading onto the bolt’s shaft.
Washer: A flat, circular disc used with bolts and nuts to distribute the load, prevent loosening, or seal the joint, enhancing durability and stability.
Duct: A passage or conduit used to direct air, gases, or cables, often made of metal or plastic, in HVAC systems or electrical installations.
