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) hasp (a fastener for a door or lid; a hinged metal plate is fitted over a staple and is locked with a pin or padlock)
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) cotter pin (a cotter consisting of a split pin that is secured (after passing through a hole) by splitting the ends apart)
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) barrel knot, blood knot (a knot used for tying fishing leaders together; the ends of the two leaders are wrapped around each other two or three times)
S: (n) bow, bowknot (a knot with two loops and loose ends; used to tie shoelaces)
S: (n) carrick bend (a knot used to connect the ends of two large ropes or hawsers)
S: (n) clove hitch (a knot used to fasten a line temporarily to a post or spar)
S: (n) figure eight, figure of eight (a knot having the shape of the numeral 8; tied in a rope that has been passed through a hole or pulley and that prevents the rope from coming loose)
S: (n) Gordian knot (an intricate knot tied by Gordius, the king of Phrygia, and cut by the sword of Alexander the Great after he heard that whoever undid it would become ruler of Asia)
S: (n) half hitch (a knot used to fasten a rope temporarily to an object; usually tied double)
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) combination lock (lock that can be opened only by turning dials in a special sequence)
S: (n) cylinder lock (a lock in which a cylinder rotates to move a bolt; tumblers are pins; inserting the key lifts and aligns the pins to free the cylinder to rotate)
S: (n) bitt pin (a pin through the bitthead to keep the mooring lines from slipping off)
S: (n) hairpin (a double pronged pin used to hold women's hair in place)
S: (n) bobby pin, hairgrip, grip (a flat wire hairpin whose prongs press tightly together; used to hold bobbed hair in place) "in Britain they call a bobby pin a grip"
S: (n) bodkin (formerly a long hairpin; usually with an ornamental head)
S: (n) hatpin (a long sturdy pin used by women to secure a hat to their hair)
S: (n) peg, nog (a wooden pin pushed or driven into a surface)
S: (n) tee, golf tee (a short peg put into the ground to hold a golf ball off the ground)
S: (n) tent peg (a peg driven into the ground to hold a rope supporting a tent)
S: (n) treenail, trenail, trunnel (a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast)
S: (n) rivet (heavy pin having a head at one end and the other end being hammered flat after being passed through holes in the pieces that are fastened together)
S: (n) safety pin (a pin in the form of a clasp; has a guard so the point of the pin will not stick the user)
S: (n) skewer (a long pin for holding meat in position while it is being roasted)
S: (n) spit (a skewer for holding meat over a fire)
S: (n) machine bolt (a bolt with a square or hexagonal head on one end and a threaded shaft on the other end; tightened with a wrench; used to connect metal parts)
S: (n) setscrew (a screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted)
S: (n) setscrew (a screw that is used to adjust the tension on a spring)
S: (n) thumbscrew (screw designed to be turned with the thumb and fingers)
S: (n) woodscrew (a metal screw that tapers to a point so that it can be driven into wood with a screwdriver)
S: (n) lag screw, lag bolt (a heavy woodscrew with a square or hexagonal head that is driven in with a wrench)
S: (n) screw eye (a woodscrew having its shank bent into a ring)
S: (n) worm (screw thread on a gear with the teeth of a worm wheel or rack)
S: (n) seal (fastener that provides a tight and perfect closure)
S: (n) break seal (a seal that must be broken when first used and cannot easily be resealed) "it was stored in a tube with a break seal"
S: (n) gasket (seal consisting of a ring for packing pistons or sealing a pipe joint)
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)