Flat head cap screws, M5 female thread diameter, 13mm total length, 304 stainless steel rivet nut.These Nuts have a flange to provide increased strength in punched and drilled holes.Knurled body provides a higher resistance to spin out when installed in soft materials.Main Color: Silver ToneFlange Size ( x k): 10 x 0.9mm/ 0.4 inch x 0.035 inch (D x Thickness)Thread Pitch: 0.8mmTotal Length (L): 13mm/ 0.5 inch Body Diameter (d): 7mm/ 0.28 inch Application Hole Size (d0): 6mm/ 0.24 inch Thread Size: (D) M5/ 0.2 inch Product Name: Rivet NutMaterial: 304 Stainless SteelWeight: 187g/setPackage content: 200 x Rivet NutsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.