u bolt Material:40Cr MOQ:50 PCS Heat treatment:Grade 8.8, 9.8 ,10.9 Surface treatment: Paint , Zinc plating , Dacromet ,Geo u boltMaterial:40Cr MOQ:50 PCSHeat treatment:Grade 8.8, 9.8 ,10.9Diameter:12mm,14mm,16mm,18mm,20mm,22mm,24mm,25mm,27mm,30mm,32mm,36mm etc.Screw pitch :1.25 , 1.5 , 1.75 , 2.0 , 2.5 , 30 and UNF etc.Shape : round , arc , square etc.Surface treatment: Black coating , ...