D-ring
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#REDIRECT Glossary of underwater diving terminology: D-G
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.[1]
Common uses[edit]
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.
- 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 type of carabiner.
- A part of a saddle (see saddle#D-ring)
- A type of ring binder.
- To attach a leash or tag to a collar or pet harness,[2] or to a waist belt, either for dog walking or for sports where the dog is intended to pull.[3]
- 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
References[edit]
- ^ "Don't Let D-rings Be "D" Problem". Preventive Maintenance Monthly (738): 15. May 2014. ISSN 0475-2953.
- ^ "How to Make a Dog Collar On Your Own". Country Brook Design. Retrieved 2018-09-18.
- ^ KERNS, NANCY (May 2024). "Dog-Walking Waist Belts: A waist belt can be used to secure your dog's leash to you for hands-free walking". Whole Dog Journal. 27 (5): 14–16. ISSN 1097-5322.