1/4"-20 Long Clip-On Nuts, A barrel with multiple threads ensures secure thread engagement. Also known as U-style clip-on nuts, these nuts firmly clip onto the edge of panels and stay secure. Stainless steel 18-8 (304) provide high corrosion resistance in wet environments. Center Of Hole To Edge: 25/32" For Panel Thickness: 0.025" to 0.15" Material:Stainless steel 18-8 (304) 25 Pcs Thread Size :1/4"-20 Long