'Rivet Nut, Nut Type Hex, Steel, Finish Zinc Yellow, Thread Size 1/4-20, Length 0.585 In., Grip Range 0.027 In. to 0.165 In., Drill Size 3/8 In., Hole Size 0.375 In., Head Height 0.030 In., Head Dia. 0.510 In., Body Dia. 0.374 In., Flange Dia. 0.510 In., Used to Securely Fasten Metals, Package Quantity 50'