Abstract: A fastener for timber decking, fences, pallets and the like comprises a joist attachment plate (11), with one or more fastening apertures (12) therein, one or more spacing flanges (13) locatable between joists (20) and planks (30), a plank spacer (14) extending between adjacent planks (30) and axially aligned plank engaging teeth (17, 18) extending from opposed sides of the plank spacer (14) to engage respective side surfaces of adjacent planks (30).