80 Pcs M4 Jack Nuts Petal Nuts Assortment Kit Includes - 80 pieces of M4 rivet nuts (jack nuts), also known as petal nuts, in an assortment kit to meet daily project needs. Material and finish - Made of high quality carbon steel. - Galvanized coating provides enhanced rust and corrosion resistance, suitable for marine environments. What it is and how it works - M4 rivet nuts are designed to be inserted into a pre-drilled hole and expanded behind the work surface when a bolt is tightened. - The expanded head is larger and securely fastens the nut to the plate, delivering strong load-bearing performance. - This creates a threaded insert in thin or hard-to-reach metal panels. Installation overview - Drill a hole to the appropriate size for the M4 rivet nut. - Insert the rivet nut into the hole. - Use a tool to pull the bolt and expand the nut so it binds firmly to the substrate. - The nut’s expanded head grips the plate securely and provides a stable thread. - Do not overtighten, as excessive force may strip the threads. Easy to install with manual or pneumatic tools - The installation can be done with two wrenches or pliers: one to hold the rivet nut in place and prevent rotation, the other to thread the screw into the nut and tighten. - As you tighten the screw/bolt, the nut crimps and locks into place. - Take care to align correctly and avoid over-tightening. Key attributes and compatibility - Size: M4 thread - Material: carbon steel with galvanizing for corrosion resistance - Function: creates a secure, threaded insert in thin metal panels - Performance: strong load-bearing capacity once installed - Compatibility: designed for M4 screws/bolts Use scenarios - Automotive and vehicle repair: fastening accessories to thin metal body panels where one-sided access is needed. - Furniture and equipment mounting: attaching brackets, hardware, or panels to steel or aluminum frames. - Marine and outdoor installations: mounting components on boats, trailers, or other exposed metal surfaces requiring corrosion resistance. This kit provides a reliable, corrosion-resistant solution for creating threaded inserts in metal substrates, with ample quantity for multiple projects.