sleeve anchor bolt 1.serrated hex flange nut 2.quality is stable for mass production 3.Cr3 zinc is availabel 4.OEM/ODM is ok sleeve anchor bolt 1.Material:(carbon)steel/stainless steel 2.Coating:Cr6 zinc/Cr3 zinc,3-5 micron,WZP of YZP. 3. Assemble:serrated hex flange nut,coned-shaped rod bolt,sleeve 4.Applications: Light to medium-duty into concrete,brick and block 5.cold forging or turning. ...