Rivet nut (falt head,round body). Material:Stainless Steel Specification:M6,M8,M10 Rivet nut (falt head,round body) ... ,M4 ,M5, M6, M8 ,M10 ,M12, inch: 1/2,3/8,1/4,5/32 3/16,5/16. material: steel, stainless steel, brass ... ,aluminium. stainless steel round rivet nut