You're reading a framing schedule and it calls out 16d common, 10d box, and 8d sinker — three different nails with three different lengths, gauges, and head types that all use the same medieval penny notation. This configurator draws every standard nail type at scale with its actual dimensions so you can finally see what a penny number means in physical terms. Use it when you're specifying fasteners or checking a nailing schedule.
General notes: select nails to avoid galvanic action between the nail and the nailed material. Nails with serrated or helically threaded shanks have increased holding power but are difficult to remove without destroying the surrounding material. Where nails are exposed to moisture, use nonferrous (aluminum or zinc-coated) nails. Choose nails for automatic nailing equipment specifically for the equipment used.