本公司是一家集生产销售为一体的紧固件生产厂家，本公司主要生产：GB70、GB/T 70.3、ISO10642、DIN7991、内六角沉头螺钉、GB5787、GB5789、DIN6921、六角法兰面螺栓、GB/T70.2、ISO7380、内六角平圆螺钉、DIN912内六角螺钉；GB5782、GB5783、DIN931、DIN933六角头螺栓；GB1228、DIN6914、JIS1186钢结构用高强度大六角头螺栓，GB27六角头铰制孔用螺栓，GB3632钢结构用高强度扭剪型螺栓；GB6170、DIN934螺母、T型、双头、方头、沉头、紧定等各种型号规格的非标螺栓，规格从M3-M100，长度不限。产品级别有：4.8级、6.8级、8.8级、10.9级、12.9级、B7、L7和B7M等，使用材料有35#、40Cr、35CrMoA、42CrMoA、25Cr2MoVA、20MnTiB和各种牌号的不锈钢材料。产品主要用于机械、建筑、桥梁、石化等。产品畅销全国各地，并远销中东、欧洲、澳洲等国家和地区。

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.