Size: 5/16 inch X 5 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
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