Description:

Size: 1/4 inch X 3-1/2 inch. Heavy duty wood screw with 6 sided hex bolt head. Features deep wood screw threads and does not accept a nut. Used in applications where standard wood screws cannot support the load (deck building, etc.). Requires pilot hole to be drilled and installs using wrench or socket tool. Thread Type: Deep, Point Style: Gimlet. Specification(s) Met: ASME B18.2.1 and ASTM A307A.