BS4504 Lap Joint Flanges (carbon steel flanges) Zhangqiu Zhenyu Forging Co., Ltd Base Info Standard:ANSI, DIN, GB, JIS, GOST, BSWType:Forged FlangesMaterial:Carbon SteelStructure:FlangesConnection:WeldingSealing Surface:RFManufacturing Way:ForgingCarbon Steel Flanges:Lap Joint Flanges Description Pre:Carbon Steel Grade 4.8 8.8 M36 HDG Electric Hex Bolt with Washer for Power Next:Carbon Steel DIN961 Grade 5.8 6.8 M20 M24 Hot DIP Galvanized Electric Hex Bolt with Two Washers for Power