Our metric threaded rod and studding (DIN 975 / 976) is fully threaded bar supplied in standard 1m lengths for cutting to size on site. Ideal for suspension, hanging services, bracketry, and custom-length fixings, threaded rod pairs with nuts and washers to form adjustable, load-bearing assemblies in steel, stainless, and galvanised finishes.

Threaded Rod & Studding - Metric Sizes

What Is a Threaded Rod?

Threaded rod  also known as studding, all-thread, or threaded bar  is a straight rod threaded along its entire length. It functions as a long, continuously threaded fastener that can be cut to any required length and secured with nuts and washers at any point. Because the thread runs the full length, the threaded rod offers exceptional flexibility: a single stock length serves countless applications, from hanging pipework and cable trays to fabricating brackets, spacers, and adjustable supports.

At Metric Specialties we stock threaded rod to DIN 975 and DIN 976 in standard 1m lengths across a full range of diameters and strength grades. Lower-strength Class 4.8 rod suits general suspension and light bracketry, while Class 8.8 rod handles higher structural loads. Stainless A2 and A4 grades resist corrosion for outdoor, marine, and hygienic work, and hot-dip galvanised rod provides heavy outdoor protection. Cut to length and locked with nuts, threaded rod is a versatile, cost-effective backbone for mechanical and building-services installations.

Key Features and Benefits

• Full-Length Thread: The continuous thread lets nuts be positioned and locked anywhere along the rod.
• Cut to Length: Standard 1m lengths can be cut on site to any custom size, minimising stock variety.
• Versatile Suspension: Ideal for hanging pipework, cable trays, ductwork, and building services.
• Adjustable Assemblies: Nuts at both ends allow precise, adjustable clamping and positioning.
• Strength and Corrosion Options: Class 4.8/8.8 steel, stainless, and galvanised grades suit light to structural, indoor to marine use.

Materials and Finishes

• Steel Class 4.8 (Zinc Plated): General-purpose rod for suspension and light bracketry.
• Steel Class 8.8: Higher-strength rod for structural and load-bearing assemblies.
• Hot-Dip Galvanised: Heavy outdoor corrosion protection for exposed structural work.
• Stainless Steel A2 / A4: Corrosion-resistant rod for outdoor, marine, and hygienic use.

Standards Compliance

• DIN 975  Threaded rod (general).
• DIN 976  Metric fully threaded studs / studding.
• ISO 261  ISO metric screw threads.

Common Applications and Industries

Threaded rod is a backbone of building services and construction, suspending pipework, cable trays, ductwork, and lighting from ceilings and structures. Fabricators use it for brackets, frames, spacers, and custom-length fixings, and mechanical engineers rely on it for adjustable supports, tie rods, and clamping assemblies where nuts set position along the thread.

In agriculture, plant, and general maintenance, threaded rod provides a versatile, cut-to-length fixing that reduces the range of stock needed on site. Galvanised and stainless grades extend its use to exposed outdoor, coastal, and hygienic installations, while higher-strength Class 8.8 rod carries structural and load-bearing duties in heavier assemblies.

How to Choose the Right Threaded Rod

Select the strength grade for the load: Class 4.8 suits general suspension and light bracketry, while Class 8.8 handles higher structural loads. Match the diameter and thread to the nuts and fittings you will use, and choose a length allowing for site cutting from the standard 1m stock.

Pick the finish for the environment  zinc-plated for indoor and light outdoor use, hot-dip galvanised for exposed structural work, and A2 or A4 stainless for coastal, marine, and hygienic settings. After cutting to length, deburr or run a nut off the cut end so mating nuts thread on cleanly, and secure with washers and a locking method where vibration is a concern.

Size Range and Availability

Available in M3 through M39 in standard 1m lengths, in zinc-plated steel Class 4.8/8.8, hot-dip galvanised, and A2/A4 stainless, with coarse thread as standard.

Why Buy From Metric Specialties

As dedicated metric fastener specialists, we hold threaded rod & studding in the sizes, grades, and finishes that engineers actually need, backed by clear DIN and ISO standard references so you can specify with confidence. Every item is sourced to recognised standards and quality-controlled, giving you consistent thread fit, strength, and corrosion performance across repeat orders.

Whether you need a single item for a repair or bulk quantities for production, our range, technical guidance, and fast dispatch help you find the exact fastener for the job. If you are unsure which size, grade, or finish suits your application, our team can help you match the right product to your load, environment, and standard, so your assemblies are reliable and built to last.

Frequently Asked Questions (FAQs)

1. What is threaded rod used for?

Threaded rod is used for suspension and hanging of pipework, cable trays, and ductwork, plus bracketry, spacers, adjustable supports, and any custom-length threaded fixing secured with nuts and washers.

2. What is the difference between threaded rod and studding?

The terms are used interchangeably  both refer to a bar threaded along its entire length (DIN 975/976). Studding is a common name in building services; threaded rod or all-thread is common in general engineering.

3. Can I cut the threaded rod to length?

Yes. Threaded rod is supplied in standard lengths specifically to be cut to size on site with a hacksaw or cutter. Deburr the cut end or run a nut off it so mating nuts thread on cleanly.

4. What strength grades does threaded rod come in?

We stock Class 4.8 for general suspension and light work, and Class 8.8 for higher structural loads, plus A2/A4 stainless and galvanised grades for corrosion resistance.

5. What length is standard for threaded rod?

Threaded rod is most commonly supplied in 1m lengths, which can then be cut to the required size. This keeps stock simple while covering a wide range of applications.

6. Is threaded rod suitable for outdoor use?

Yes, with the right finish. Zinc-plated rod suits light outdoor use, hot-dip galvanised offers heavy outdoor protection, and A2/A4 stainless resists corrosion in coastal and marine environments.

7. How do I secure the threaded rod?

The threaded rod is secured with nuts and washers at the required points. A nut and washer on each side of a fixing, or a locking method such as a nyloc nut, holds components firmly in place.

8. What nuts fit threaded rod?

Standard hex nuts of the matching size and thread fit the threaded rod. For locking, use nyloc or jam nuts; for spreading load, add flat washers of the same size.

9. Is threaded rod available in fine thread?

Our standard threaded rod is metric coarse thread, which suits most suspension and general work. Fine-thread requirements can be met with fully threaded studs where higher adjustment precision is needed.

10. What sizes do you stock for threaded rod?

We stock M3 through M39 in 1m lengths, in zinc-plated steel Class 4.8/8.8, hot-dip galvanised, and A2/A4 stainless.