... within 150mm4Head diametre rangethe largest is 35mm5Surface treatmentZinc,Nickle,Passivated,Tin-plated,Sandblast &Anodize,Chromate,6Heat treatmentsoft, case harden, Grade4.8 ... ,6.8, 8.8, 10.9, 12.9, and so on.7StandardDIN.ANSI/ASME.JIS.BA8CertificationISO 9001 ... of making the fasteners,and have more prefessional technical staff for design and quality control.4. Workshop Show:We have ...