Midwest Fastener 12mm-1.75 Black Phosphate Class 8 Steel Coarse Thread Nylon Insert Lock Nuts (146 Ct.)-

A lock nut is a nut that resists loosening under vibrations and torque. Used to connect both metal and wood components. As the industrys most trusted fastener supplier, Midwest Fastener has earned a reputation for delivering a complete line of high-quality bulk and construction fasteners to meet consumer needs. Contractors and DIYers alike have come to depend on Midwest Fastener to provide them with the critical parts and fasteners necessary to ensure the success of their projects.