Material: carbon steel, 65Mn All sizes are avaliable The deterails can make by customers' require (1)Material: carbon steel, 65Mn(2)Surface: plain ,black, zinc white(3)Standard: ANSI,GB,ISO(4)Size:1.4-10(5)port:shanghai or ningbo china(6)delivery:30 daysWe can produce it as per your engineering drawings or samples. Flat head Semitubular rivet