Description: 1. Model no.: astm a193 b7/b7m 2. Trademark: sd 3. Packing: small box, carton, bulk cartons/pallet and gunny bag 4. Origin: ningbo 5. Hs code: 731815909 Features 1. Finish: black 2. Material: 45# carbon steel 3. Surface treatment: plain, black, zinc (zp), yellow zinc plating (yzp), hot dipped galvanizing (hdg), dacromet and ptfe 4. Threads: unc and un Specification 1. Model no.: astm a193 b7 2. Sizes: 1/2 to 4 inches 3. Grade: b7 4. Standard: astm Competitive advantages 1. Top quality control 2. Competitive price 3. Various of design 4. Oem accepted 5. Customer's design and logo are welcome