Types of SMI Nuts and Bolts
SMI Fasteners come in many different forms and material’s like stainless steel, black oxide stainless steel, solid brass, silicon bronze, hot dip galvanized, yellow zinc, zinc plated steel, aluminium. To make it easy for you, we’ve compiled the data as a guide for figuring out what each fastener is and which one you would require for your project.

*Note: Bolts are fasteners that require a nut or pre-tapped hole to be installed. Screws use their threads to provide their own holding power. The terms in the industry are commonly mixed so sometimes you will see something that is called a screw or a bolt that is actually the opposite. Example: Lag Bolts and Lag Screws are the same thing. We have broken them down according to their true definition.