50 Pack Self-clinching Hardware 14-20 Flange Rivet Nuts, 304 Stainless Steel Rivnut, Jamaica Permanent Threaded Inserts For Thin Panels Material: Stainless Steel, Surface treatment: Passivation , Outer Diameter(Max): 0., 44; Outer Diameter(Min): 0., 34; Length: 0., 22 , Suitable for a 0., 1 thick mounting plate, the mounting hole diameter is about 0., 17., Perfect for applications where a thin sheet requires load-bearing threads but still must remain smooth, with no protrusions on either surface. Uxcell Self -Clinching Nuts,1/4-20 X 0.22-Inch Stainless Steel Rivet Nut Round Head Steel Metal Sheet Mounting Hardware Fastener 50pcs. $43.99. $2498USD 10-32 Phillips Pan Head Machine Screw 316 Stainless Steel #10-32 x Self -Clinching Rivet Nuts:These standoffs, which use the proven self-clinching design, install with a squeeze in punched or drilled round holes and become permanently mounted in the thin sheet.