... :M12-M32 4.grade:4.8,8.8,10.9 u-bolt, u-bolt 10.9, square u-boltsCertificate: ISO9001:2000High quality ... strengthen: Grade 8.8, 10.9Material: mild steel, 45# steel, 40CrThread pitch: 1.5mm, 2.0mm, 3.0mmSupply ability: 500 metric ... any questions, please feel free to contact me. u-bolt 10.9