Fire Couplings Product attributes Part NameStainless steel threaded coupling Production processInvestment casting, also say, lost wax casting and precision casting Surface treatmentElectro-polishing and machining Shipping statusMachining Tolerance standardVDGP690-D2 class Heat treatmentSolution treatment Surface roughnessRa1.6-6.3 Max. size300mm*300mm Max. weight60.00Kg MaterialStainless steel CF8M StandardSA351 Product details Stainless steel threaded coupling, can be used in a wide range of fields. The materials we can cast are 304, 316, 1.4408 and 1.4308 and so on. You could choice the material you want, we can produce it as per your requirements, because our main business is to make OEM for our customers. RFQ Q.Are you a factory? A.Yes, we are a factory, there are about 150 workers in our factory. Q.When did you build the factory A.Our factory was founded in 1996. Q.Where are you located? A.We are located in Foshan city, about 30 minutes away from Guangzhou China. Q.What is area of your factory? A.Our factory has about 8500 square meters. Q.What is the main business of your company? A.Our company focus on investment casting (also say lost wax casting