1 screw &nut 2 material :plastic /element 3 standard:ISO9001:2000 4 OEM/ ... is a Chinese manufacturer specialized in OEM ,Die casting,Plastic injection, CNC,Stamping and stamping mould. Our company ... .1) material: can be steel, brass, stainless steel, plastic, Aluminium…2) surface treatment:kinds of plating (Zinc, Nikel ... made packaging method according to customer's requirement screw with plastic head