Standard: Din914 / Din915 / Din916 Musammantawa: M3-M20 ko Custom abu: 35K, 45 #, 40Cr (SAE1045, 5140), SS304, SS316 m Tsari: Waya sanda → Anneal → Acid cleaing → zaro waya → gyare-gyaren da kuma mirgina thread → zafi magani → surface bi → Packing surface bi: Bayyana, Black oxide, Blue fari tutiya, Yellow tutiya, Hot tsoma galvanized, Copper plating, Gold plating, Chromium plating. Quality Control: Raw abu duba → aiwatar sa idanu → Product gwajin → marufi rajistan shiga Certification: ISO9001: 2008 Marufi: prod ...