... GR7,GR9,GR11 Standard DIN,GB,ISO,JIS colour bule,red yellow,green,goldSpecification screw: M4-M30Nut: M4-M24Washer: M4-M24Surface TreatmentPolishing ... Class 12.9Professional as one of the leading titanium set screw manufacturers, Titanium Industry is also well-known among those ... credible such suppliers in China. Equipped with a productive factory, we welcome you to ...