Wood anchors are designated by the size screw they are used with and the length which is measured from end to end. Wood screw (lead) anchors are wedged into a hole and then expanded for a tight fit with the insertion of a wood screw or similar item. Threaded rod anchors for wood can be used in lumber and plywood. Plywood is less flexible than lumber.

Thread Threaded
Type Wood
Drive Type Hex
Grade A1 & A2 Stainless Steel, A2 & A4 Steel
Material Brass, Stainless Steel, Steel, Other light alloy
Applications For used in wood and composite materials and with recess to accommodate excess wood shavings.
Thread Size M4 M5 M6 M7 M8 M10 M12 M14 M16
Outside (Mm) 5 6.5 8 8 10 12 15 18 20
Full Length (Mm)15 15 20 23 28 28 32 38 43 50
Safe Static Load Tension (KN) 0.02 0.87 1.10 1.30 1.40 2.20 2.30 2.50 2.85

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