1.Standard:Metric,Imperial,UNF,UNC 2.Wide temperature ranges 3.Free running insert 4.ISO9001:2008 Certification Helicoil thread insert is a kind of screw connecting component witch consist of diamond –section stainless material with high strength and accuracy and corrosive resistance. Particularly adopted for soft materials such as aluminum, magnesium, cast iron, plastic, it improves the ...