Qualfast: M4 Steel Reduced Head Knurled Rivet Nut (Box-500) All of our rivet nuts have a clear plating which is RoHS compliant - this is now the preferred finish across all industries as there is no chromium content as is the case with zinc and yellow finish. Steel, Low Profile Head, Splined Body The splines on the body bite into the parent material on installation, creating an improved torque resistance compared with standard round bodied rivet nuts. The low profile head creates a high load bearing feature but only results in minimal stand off between the adjoining panels. MPN: 5036140059399 EAN: 5036140059399 M4 Steel Reduced Head Knurled Rivet Nut (Box-500) Attributes: Box Quantity: 500 Dimensions D: 6.3mm Dimensions H: 7.1mm Dimensions L: 10.5mm Dimensions P: 0.5mm Hole Diameter: 6.4 Material: Steel Range: 0.5-2.5 Supplied In: Pack of 500 Surface Treatment: Plain Thread: Metric Thread Size: M5