Check the listing for details. 5pcs M6 Jack Nuts Threaded Insert Nut 304 Stainless Steel Rivet Nuts. Condition: New. Listed at 14.35 USD. Description:1. Material: Jack nut is made of carbon steel, zinc-plated surface treatment, high hardness, oxidation resistance, rust resistance and corrosion resistance, and durability.2. Easy to use: Drill a suitable hole according to the size, then insert the jack nut with a tool to pull the bolt so that it expands and binds firmly to the substrate. The expanded head of the nut is larger and can be securely fastened to the plate, it has good load-bearing capacity.3. Application: Rivet nuts can be firmly fixed on thin sheet metal to provide tight screw locking force, such as sheet metal or non-metallic materials, plastics, wood, etc. Widely used in industry, construction, furniture, electrical appliances, equipment, and so on.Specifications:Material: Carbon SteelFinish: Zinc PlatedPerformance Grade: 4.