Ningbo Situo Fastener Co., Ltd, Located in Zhenhai District, Ningbo, China We have 1 full sets of hot forged equipment and 10 bolts multi-location automatic cold forged equipment,1 lines of automatic heat treatment production and 4 advanced CNC machines,1 laboratory with full test equipment. Now we have 50 staffs, We use ERP management system, having a full set of modern production management system. We mainly produce high strength and high quality fasteners widely used in Tractor ,automobile, construction, energy, heavy machinery, transportation, bridge and oil pipeline industries. Since 2005. Now We monthly capacity prodcution 1000Tons,standard fastener in accordance with GB, DIN, ISO,ANSI/ ASTM/SAE/IFI, AS,BS, UNI, JIS., etc Size:from M4-M100 1/4- 4 Grade: CL4.8 5.8 8.8 10.9 12.9 2 5 8 Furface coating:Black,Zinc plated,Yellow zinc plated,PH.HDG,Dacromet,Nickelage, Electric Zinc Etc.