... .types:hexagon,squared, plain.etc. 3.model:forklift parts iron conical nut1.machines: cold headers,numerical control machines, measuring trucks, thread ... , grinding machine.etc.2.types: filter parts, hex nut and bolt, tube joint, cold heading blank, anchor part,forklift parts.etc ... .5.certificate: ISO90016.ideas: best quality with best serving iron conical nut