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D-ring

Item of hardware

A D-ring used to secure cargo in a utility trailer

A D-ring is an item of hardware, usually a tie-down metal ring shaped like a capital letter 'D' used primarily as a lashing or attachment point. The term is found interchangeably spelled in different forms, such as: D ring, D-ring or dee-ring.

A D-ring 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; though there are D-rings with a middle body designed to be welded to steel. Ideally, a D-ring swings freely after it has been secured. D-rings may vary in composition, geometry, weight, finish and load (rated) capacity.

Though there are differences, a weld-on pivoting link is commonly called a D-ring.

To minimize obstruction when the D-ring is not in use, recessed tie-down rings are designed that accommodate the D-ring so it is flush to the surface. There are some non-recessed designs that have an adhesive base. Work load limits are specified where appropriate.

For D-rings used in the bed of a truck to secure loads, regular preventative maintenance is important to avoid costly repairs.{{Cite journal

D-rings may be made of plastic for applications such as fixtures for straps for hiking equipment.

Common uses

Applications of D-rings include:

For light loading applications such as clothing and luggage, D-rings made of plastics such as nylon may be used, as they weigh less and are impervious to rusting.
As a component for lacing up items of footwear like hiking boots or any adjacent heavy-duty footwear.
At the end of a tow-rope or chain, to allow the creation a bow around an item or part of an item that is being towed.
With a chain to tether a boat to a dock or tree when it is being moored.
In theatres, commonly used where a piece of scenery has to be lifted or "flown". D-rings are attached to the tops or bottoms of flats with a "drift line" and turnbuckle attached to adjust the "trim".
A D-ring on an M16 or variant type rifle is used to increase the pressure on the extractor and reduce malfunctions. This D-ring is a rubber grommet shaped like a "D" and fits over the extractor spring adding tension to it.
On breathing sets and scuba divers' buoyancy compensators
A bit ring used on the bit of a horse.
A D-ring carabiner has a section which opens and can be secured, to attach a rope for climbing or caving or to attach other items.
A part of a saddle (see saddle#D-ring)
A D-ring binder is a type of ring binder which uses D-shaped rings to accommodate larger documents or more pages.
To attach a leash or tag to a collar or pet harness, or to a waist belt, either for dog walking or for sports where the dog is intended to pull.{{Cite journal
On a prisoner transport belt to accommodate a pair of handcuffs
As part of BDSM restraints, clothing, or furniture, to act as an attachment point for rope or chain
For hanging a framed picture, D-rings attached to a small metal plate with a hole in it are used: the D-ring is attached to the frame with a screw through the hole, and the wire to hang the picture passes through the D-ring.
Two adjacent D-rings can be used as an adjustable fastener for a strap in clothing such as overalls .

References

"Plastic Rings and Loops".
"Heavy Duty Carabiner Clips UK - 6x D-Ring Screw Lock {{!}} Best in Online - Maskura - Get Trendy, Get Fit".
"D Ring Carabiner".
"What should I know about ring binders?". MyBinding.
"How to Make a Dog Collar On Your Own". Country Brook Design.
(12 October 2014). "How to hang a picture". The Guardian.
(25 November 2021). "How to Sew D-Ring Straps for Overalls".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

hardware-(mechanical)

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