Thread Rods Thread Rod d: 2mm-20mm L: up to 500mm Parameters Material Carbon Steel, Stainless Steel Steel Grade DIN: Gr.4,5,6,8.8,10SAE: Gr.2,5,8ASTM: A563 Size Standard Full SizeCustomized Size Surface Treatment Zinc Plating, Black OxideChrome Plating, Sand BlastingPlain