Platte River 110029, Wood Specialties, Buttons & Plugs, 3/8" Mahogany Flat Head Plugs, 100-pack End grain plugs have a tapered shape for a snug fit. Specifications: Height=1/4 in, Hole Diameter=3/8 in, Outside Diameter=3/8 in Specifications: Species=MAHOGANY, Taper=1 degrees