Cov carbon steel fasteners feem ntau yog coated nrog kev lag luam PTFE (luv rau polytetrostoroethylene) hauv cov ntawv thov uas yuav tsum muaj zog thiab corrosion tsis kam thiab muaj kev lag luam siv tau. SAE-AISI 1018, 1020, 1040, 1045, 1045 \ / ck45 yog cov muaj roj teeb roj teeb siv los ua cov nyiaj no. Industry specifications such as ASTM A36, A193, A194, A307, A354, A449, A540, A563, F1554 and SAE J429 cover high strength carbon steel fastener grades.