nail length

What Diameter Is 8d Nail? Nail Size Head Diameter 5d nails 12 1/4′′ 6d nails 11 17/64′′ 8d nails 109/32′′ 10d nails 9 5/16′′ What is an 8d common nail? Nails. For historical reasons, nails are sold both by a number followed by d and (less confusingly) by length. The “d” stands for penny, so