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" x 0.035" (D x Thickness)Thread Pitch: 0.8mmTotal Length (L): 13mm/ 0.5"Body Diameter (d): 7mm/ 0.28"Application Hole Size (d0): 6mm/ 0.24"Thread Size: (D) M5/ 0.2"Product Name: Rivet NutMaterial: 304 Stainless SteelWeight: 187gPackage Content: 100 (+/-2%) x Rivet NutsNote: 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.