D-ring
Encyclopedia
Hardware
Hardware is a general term for equipment such as keys, locks, hinges, latches, handles, wire, chains, plumbing supplies, tools, utensils, cutlery and machine parts. Household hardware is typically sold in hardware stores....
, usually a metal ring shaped like the letter D
D
D is the fourth letter in the basic modern Latin alphabet.- History :The Semitic letter Dâlet may have developed from the logogram for a fish or a door. There are various Egyptian hieroglyphs that might have inspired this. In Semitic, Ancient Greek, and Latin, the letter represented ; in the...
. It may be used at the end of a leather or fabric strap, or may be secured to a surface with a metal or fabric strap. Applications of D-rings include:
- For light loading applications such as clothing and luggageLuggageBaggage is any number of bags, cases and containers which hold a traveller's articles during transit.Luggage is more or less the same concept as "baggage", but is normally used in relation to the personal luggage of a specific person or persons Baggage is any number of bags, cases and containers...
, D-rings made of plastics such as nylonNylonNylon is a generic designation for a family of synthetic polymers known generically as polyamides, first produced on February 28, 1935, by Wallace Carothers at DuPont's research facility at the DuPont Experimental Station...
may be used, as they weigh less and are impervious to rustRustRust is a general term for a series of iron oxides. In colloquial usage, the term is applied to red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture...
ing. - Commonly, at the end of a tow-rope or chain, to allow one to create a bow around an item or part of an item that is being towed by a vehicle. They are commonly used with a chain to tether a boatBoatA boat is a watercraft of any size designed to float or plane, to provide passage across water. Usually this water will be inland or in protected coastal areas. However, boats such as the whaleboat were designed to be operated from a ship in an offshore environment. In naval terms, a boat is a...
to a dockDock (maritime)A dock is a human-made structure or group of structures involved in the handling of boats or ships, usually on or close to a shore.However, the exact meaning varies among different variants of the English language...
or treeTreeA tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
when it is being moored. - In theatreTheatreTheatre is a collaborative form of fine art that uses live performers to present the experience of a real or imagined event before a live audience in a specific place. The performers may communicate this experience to the audience through combinations of gesture, speech, song, music or dance...
s, commonly used where a piece of scenery has to be lifted or "flown". D-rings are attached to the tops or bottoms of flatsFlats (theatre)Flats, short for Scenery Flats, are flat pieces of theatrical scenery which are painted and positioned on stage so as to give the appearance of buildings or other background. They are also called backdrops or backcloths....
with a "drift line" and turnbuckle attached to adjust the "trim". - A D-ring on an M16M16 rifleThe M16 is the United States military designation for the AR-15 rifle adapted for both semi-automatic and full-automatic fire. Colt purchased the rights to the AR-15 from ArmaLite, and currently uses that designation only for semi-automatic versions of the rifle. The M16 fires the 5.56×45mm NATO...
or variant type rifle is used to increase the pressure on the extractor and reduce malfunctions. This D-ring is a rubber grommetGrommetthumb|right|250px|Some rubber grommets.A grommet is a ring inserted into a hole through thin material, such as fabric. Grommets are generally flared or collared on each side to keep them in place, and are often made of metal, plastic, or rubber. They may be used to prevent tearing or abrasion of...
shaped like a "D" and fits over the extractor spring adding tension to it. - On breathing setBreathing set*Scuba set, used underwater*Rebreather, reprocesses exhaled air*Surface supplied diving, fed from the surface*Self-contained breathing apparatus, used out of water, worn by rescue workers, firefighters, and others*Spacesuit, used in space...
s and scuba divers' buoyancy compensators, from which to hang kit, as in this image - A bit ringBit ringThe bit ring is the ring on the side of a horse's bit, particularly on a snaffle bit. It is used as a point of attachment for the cheekpieces of the bridle and for the reins. It also has an effect on the action of the bit...
used on the bit of a horse. - A type of carabinerCarabinerA carabiner or karabiner is a metal loop with a sprung or screwed gate that is used to quickly and reversibly connect components in safety-critical systems. The word comes from "Karabinerhaken", meaning "hook for a carbine" in German.-Use:...
. - A part of a saddleSaddleA saddle is a supportive structure for a rider or other load, fastened to an animal's back by a girth. The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures...
.