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41496 Nonut

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June 2024

 TDBL- nonut® a revolution for the construction industry


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TDBL- nonut®


SFS Group Fastening Technologyhave launched an innovative solution for the construction market, which will save time onsite.

The newTDBL- nonut®- which carries ETA-11/0191 approval - has exceptional performance thanks to its patented thread shape, under-head locking detail and trilobular geometry. Together ensuring that the fastener remains firmly in place and cannot be loosened. Thus, ensuring cost-effective time savings when compared to the traditional nut and bolt.

The TDBL- nonut® enables fast and easy installation from one side meaning it can be used in previously inaccessible or hard-to-reach places, making it ideal for working on steel construction where, for example, it can be employed for the attachment of steel sections such as brackets and support rails to enclosed steel sections where the use of standard nuts and bolts is impractical.

Applications of the TDBL-nonut® include:

·        High-bay construction

·        Stage construction

·        steel construction

·        Lightweight steel construction

·        Steel construction for PV systems

·        Shelving construction

·        Platform construction (Mezzanine)

·        Teardrop plate direct fastening with HO plate

Callum Thornton, Product Manager for SFS, commented: "The TDBL- nonut® offers a significant benefit to the industry, offering savings of time, money and inventory size. It is the ideal solution for the connection of statically loaded supporting structures, allowing users to work quickly, easily, and effectively."

TDBL- nonut® are a case hardened, thread forming fastener available in a diameter of 8.6 mm with a length of 16 mm and in a diameter of 10.6 mm with lengths of 23, 30 and 50 mm as well as a new lower profile flatter head version of each.

Further installation details and design values can be found within the assembly instructions, ETA andproduct literature.

For further information, call0330 0555888or visit



With Compliments:

Taylor Alden
7 Bell Yard





SFS Group Fastening Technology's Construction Division is the world's largest manufacturer and distributor of carbon and stainless-steel fastening solutions for roofing, cladding and façade systems.Additionally, SFS manufactures an award-winning fall protection range, innovative rainscreen subframe systems and high-quality hinges for windows and doors. The reputation of this established company, which has been in the UK for over 120 years, rests on value added propositions along with company-wide technical expertise.Today, the company does not solely create products to fix, fasten and protect buildings; the proprietary "Securing Futures" mission ensures that investments and people are better protected too. 

SFS focusses on four pillars of media content:        

Safety in Construction     

Digital Construction

Sustainability in Construction

Modern Methods of Construction