S: (n) bellyband (a strap around the belly of a draft animal holding the shafts of a wagon)
S: (n) buckle (fastener that fastens together two ends of a belt or strap; often has loose prong)
S: (n) button (a round fastener sewn to shirts and coats etc to fit through buttonholes)
S: (n) carabiner, karabiner, snap ring (an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes)
S: (n) catch (a fastener that fastens or locks a door or window)
S: (n) clasp (a fastener (as a buckle or hook) that is used to hold two things together)
S: (n) cleat (a fastener (usually with two projecting horns) around which a rope can be secured)
S: (n) clinch (the flattened part of a nail or bolt or rivet)
S: (n) clip (any of various small fasteners used to hold loose articles together)
S: (n) corrugated fastener, wiggle nail (a small strip of corrugated steel with sharp points on one side; hammered across wood joints in rough carpentry)
S: (n) cotter, cottar (fastener consisting of a wedge or pin inserted through a slot to hold two other pieces together)
S: (n) knot (any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object)
S: (n) lashing (rope that is used for fastening something to something else) "the boats were held together by lashings"
S: (n) link, linkup, tie, tie-in (a fastener that serves to join or connect) "the walls are held together with metal links placed in the wet mortar during construction"
S: (n) lock (a fastener fitted to a door or drawer to keep it firmly closed)
S: (n) snap, snap fastener, press stud (a fastener used on clothing; fastens with a snapping sound) "children can manage snaps better than buttons"
S: (n) toggle (a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable))
S: (n) toggle bolt (a fastener consisting of a threaded bolt and a hinged spring-loaded toggle; used to fasten objects to hollow walls)