With a 0.162inch shaft diameter and 0.340inch head, this 9-gauge Simpson StrongTies 31/2in. StrongDrive SCN SmoothShank Connector Nail corresponds to a 10D penny size and is rated to match the loads published for Simpson connectors. It carries a unique head ID stamp for inspector validation and code compliance. Packs are offered in both 40count and 200count bulk formats, making them suitable for both small-scale installs and high-volume jobsite deployments.