●We will try our best to provide you with a good shopping experience. ●Material: carbon steel ●:nickel-plated / blue zinc-plated / black zinc-plated ●Thread diameter:3mm(M3) / 4mm(M4) / 5mm(M5) / 6mm(M6) / 8mm(M8) / 10mm(M10) ●Thread pitch:0.5mm(M3) / 0.7mm(M4) / 0.8mm(M5) / .0mm(M6)/.25mm(M8) / .5mm(M10)