DIN 933 Hex Bolt | Full Thread | 4.8 8.8 10.9 12.9 | Carbon Steel / Stainless Steel

1. Core Features of DIN 933 Hex Bolts

DIN 933 specifies fully threaded hexagon head bolts with metric coarse threads. Unlike partially threaded DIN 931, the entire shank is threaded, allowing flexible nut positioning and strong holding force in thin materials or assemblies. Standard sizes range from M1.6 to M52, covering most industrial and construction needs.

Key advantages:

Full threaded design for uniform load distribution

Standard hex head for high torque and easy tool fitting

Strict dimensional tolerance for consistent fit

Broad grade availability to match strength and environment

Worldwide recognition for easy replacement and cross‑border procurement

2. Material Grades and Finishes

DIN 933 bolts are produced in multiple grades to suit different loads and conditions:

Class 4.8: Mild carbon steel for general indoor use

Class 8.8 / 10.9 / 12.9: High‑strength alloy steel for structural and heavy machinery

Stainless steel A2/A4 (304/316): Corrosion‑resistant for outdoor, marine, and food equipment

Common surface finishes include black oxide, electro zinc plating, hot‑dip galvanizing (HDG), and mechanical plating. These coatings extend service life in humid, corrosive, or outdoor environments while maintaining standard compliance.

3. Typical Applications

DIN 933 hex bolts are used in nearly every engineering field:

Mechanical equipment: Assembly of pumps, motors, gearboxes, and tools

Steel structures & construction: Frames, brackets, and general fabrication

Automotive & transportation: Vehicle parts, trailers, and rail components

Electrical & plumbing: Control panels, pipe supports, and fixtures

Furniture & appliances: Stable assembly for long‑term use

Their versatility and standardization make them a top choice for OEM production, maintenance, MRO, and on‑site repair projects.

4. Quality and Supply Advantages

Professional manufacturers produce DIN 933 bolts under strict process control: raw material inspection, precision forming, accurate threading, heat treatment, and final testing. Compliance with DIN 933 and ISO 898‑1 ensures mechanical performance, hardness, and thread accuracy meet global requirements.

Leading China fastener suppliers offer strong advantages in scale, delivery, and cost efficiency. With monthly capacity over 2,000 tons, modern production lines, and full testing equipment, they provide stable supply for small batches and bulk orders alike. Complete specifications and short lead times support global buyers across Europe, North America, Australia, and Asia.

Conclusion

DIN 933 hex bolts continue to be an essential fastener in 2026, valued for standardization, versatility, and reliability. As global engineering and manufacturing demand consistent, high‑quality metric fasteners, DIN 933 remains a preferred solution for countless applications.

Gangtong Zheli Fasteners supplies full‑range DIN 933 hex bolts in 4.8, 8.8, 10.9, 12.9 grades and stainless steel A2/A4, complying with DIN 933, ISO 4017, and ISO 898‑1. With large‑scale production, strict quality control, and global export experience, we provide reliable DIN 933 fasteners for machinery, construction, automotive, and engineering projects worldwide.