Steel Grade: 4140 Standard: AISI, ASTM, BS, DIN, GB, JIS Dimensions: D10mm~800mm Place of Origin: Tianjin China (Mainland) Quick DetailsSteel Grade: 1020Standard: AISI, ASTM, BS, DIN, GB, JISDimensions: Dia:200-1000mmPlace of Origin: Guangdong China (Mainland)Brand Name: yaotengModel Number: 1020Technique: Hot RolledApplication: Screws/nuts/washers/small shaft/stAlloy Or Not: Is AlloySpecial Use: ...