5/16" - 18 Screw Size Panel Range: .010"- .165" Center of Hole to Edge: 5/8" Black Phosphate Finish Extruded "U" Nuts Compare with: Auveco #10830, G.M. # 1494253, Chry# 3786805, Car Pak # 66-3029, 663029, W&E # 915, Barnes / Kar # MP158, Crest / Midwest # CRX318, Disco # 1835PK, 1835B, Kent / Lawson # P40941, Winzer # 398.15163, Wurth # 150159291, Kimball / Midwest # 10876