Hex Coupling Nuts Steel Nickel Coupling Nut,Yellow Zinc Plated Coupling Nut, Customized Coupling Nut Hex Coupling Nuts are used as extension nuts that can bind together the male ends of two fasteners,most commonly threaded rods.  Our Low Carbon Steel Hex Coupling Nuts have many sizes including CL4, 6, 8, 10, 12, SAE J995 Gr.2, 5,8. A194 2H, ASTM A563 Gr. A with black oxide, blue zinc plated, H.D.G, nickel, chrome materials. If you need, please no hesitate to contact us. Standard ASME/ANSI, DIN, ISO, JIS, BS standard/non-standard sizes Material Carbon steel, stainless steel, alloy steel etc. Grade CL4, 6, 8, 10, 12, SAE J995 Gr.2, 5,8. A194 2H, ASTM A563 Gr. A Finish Plain, black oxide, (clear/yellow/blue)zinc plated, H.D.G, nickel, chrome etc Package Bulk in cartons+ wood solid pallet or custom packing Delivery time Flexible upon order qty, normally within 30-40 days Payment T/T, L/C, Western Union etc Trade term FOB, CIF, CFR, EXW, DDP, DDU etc