Check the listing for details. 25pcs 1/4-20 Multi-Grip Rivet Nuts Pre-Bulbed Shank Insert Nut Gold Zinc. Condition: New. Listed at 17.58 USD. Description:1. Material: Multi grip rivet nut is made of carbon steel, gold zinc 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 pre-bulbed rivet nut and tighten the locking nut with the rivet tool.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: Gold Zinc platedPerformance Grade: 4.8Thread Diameter: 1/4-20Total Length: 27.5mm / 1.08"Head Size: 16 x 1.5mm / 0.63" x 0.06"(D*T)Rod Diameter(Drill Hole Size): 9mm / 0.35"Length after Riveting: 12.