Standard Dimensions: Hole Diameter: 9/16" (14mm) Hole Spacing (From End): 13/16" (21mm) Hole Spacing (On Center): 1-7/8" (48mm) Width: 1-5/8" (41mm) Thickness: 1/4" (6mm) Part No. Finish Size Weight G710 EG 0.15 G714 EG 0.04 GHCS031450 EG 5/16" x 4-1/2" 0.12 HLKW031 EG 5/16" 0.00 Materials for Built-Up, Membrane, Foam and Coated Roofs