Model NO.: A194 2H Type: Hexagon Head Standard: ANSI Raw Material: Carbon Steel Heat Treatment: Yes Port: Ningbo Port Specification: ASTM HS Code: 7318160000 Material: Carbon Steel Head Style: Hexagonal Diameter: 1/2'' to 4'' Surface Treatment: Black, Zinc, H.D.G., Teflon High Tensile: Yes Trademark: SD Origin: Ningbo, China