Flat head rivet
press-in rivet
Information about press-in rivet is as follows:
diameter:Â Â Â 3Â 4Â 5Â 6Â 8
length:Â 6Â 8Â 10Â 12Â 15Â 20Â 25Â 30
material:  304      carbon steel    copper
surface finishing:  natural     coating    black    galvanizing    Dacromet coating  and so on