uxcell 100pcs M4 Stainless Steel Reduced Head Blind Hex Rivet Nut Nutserts Thread Size: (D) M4/ 0.16"; Product Name: Rivet Nut; Material: 304 Stainless Steel Weight: 115g; Package Content: 100 (+/-2%) x Rivet Nuts; Main Color: Silver Tone Thread Pitch: 0.7mm; Total Length (L): 11mm/ 0.43" Half Round Body Diameter (d): 6mm/ 0.24"; Inner Hex Socket Size (S): 5mm/ 0.2" Across Flat Hex Width(Sk): 7mm/ 0.28"; Flange Thickness (k): 0.8mm/ 0.03"