... -standard self clinching standoffs Detail Information About the standoffsMaterialCarbon steel, alloy steel, stainless steel, spring steel or as you requestThread M3, 3.5M3, M4, M5 ... order is done, thank you!! Certifications show: China zinc plated steel/ stainless steel rivet nut,clinch stud nut standoff,SO/SOS/BSO/BSOS