D-ring

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

(A) D-ring (shown in isometric view)
(B) Weld-on pivot link; note the incorrect fillet weld call-out (bottom-right). The correct method of securing a weld-on pivot link is a [t weld] which consists of a perpendicular vee butt joint secured to the billet using a butt weld or fusion weld.

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]

D-rings may be made of plastic for applications such as fixtures for straps for hiking equipment. ^[2]

Common uses

A D ring binder

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. ^{[3] [4]}
• 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. ^[5]
• To attach a leash or tag to a collar or pet harness, ^[6] or to a waist belt, either for dog walking or for sports where the dog is intended to pull. ^[7]
• 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. ^[8]
• Two adjacent D-rings can be used as an adjustable fastener for a strap in clothing such as overalls . ^[9]

References

1. "Don't Let D-rings Be "D" Problem". Preventive Maintenance Monthly (738): 15. May 2014. ISSN   0475-2953.
2. "Plastic Rings and Loops". www.pennineoutdoor.co.uk. Retrieved 10 July 2024.
3. "Heavy Duty Carabiner Clips UK - 6x D-Ring Screw Lock | Best in Online - Maskura - Get Trendy, Get Fit". Maskura - Get Trendy, Get Fit. Retrieved 10 July 2024.
4. "D Ring Carabiner". www.negeocachingsupplies.co.uk. Retrieved 10 July 2024.
5. "What should I know about ring binders?". MyBinding. Retrieved 10 July 2024.
6. "How to Make a Dog Collar On Your Own". Country Brook Design. Retrieved 2018-09-18.
7. 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.
8. "How to hang a picture". The Guardian. 12 October 2014. Retrieved 10 July 2024.
9. "How to Sew D-Ring Straps for Overalls". Sie Macht. 25 November 2021. Retrieved 10 July 2024.