fittings of hydraulic system 1.material: metal and carbon steel 2.shapes: ... ,plain. 3.model: non-standard fasten fittings of hydraulic system 1.machines: cold headers,numerical control machines,measuring trucks, ... thread rollings, grinding machine,etc.2.types: filter parts,hex nut and bolt, tube joint,cold heading blank ... : best quality with best serving fittings of hydraulic system