304/316 DIN 934 Heavy Duty Stainless Hex Nuts (Metal/Wood)

Product Overview

The 304/316 DIN 934 Heavy Duty Stainless Hex Nuts are precision-engineered fasteners designed to deliver secure, vibration-resistant connections in the most demanding metal and woodworking applications. Available in two premium materials—304 stainless steel (18% chromium, 8% nickel) and 316 stainless steel (16% chromium, 10% nickel, 2% molybdenum)—these nuts offer tailored solutions for varying environmental conditions. Compliant with DIN 934, a globally recognized standard for hex nuts, they ensure dimensional accuracy, thread quality, and mechanical performance across industries ranging from construction to food processing.

Unlike standard hex nuts, which may fail under heavy loads or corrosive conditions, these heavy-duty variants feature thicker walls and precision threads, making them ideal for applications where reliability and longevity are critical. Their versatility allows use in both metal-to-metal connections—such as structural steel joints—and metal-to-wood applications, including timber framing and outdoor furniture.

Product Specifications

Features

Dual Material Options

304 Stainless Steel: A cost-effective choice for indoor or low-corrosion environments, 304 stainless steel offers excellent resistance to rust in freshwater, mild detergents, and atmospheric conditions. Its austenitic structure provides good ductility, allowing for secure tightening without cracking. It is commonly used in furniture manufacturing, indoor structural steel, and non-critical outdoor applications.

316 Stainless Steel: Enhanced with molybdenum, 316 stainless steel excels in chloride-rich environments, making it ideal for marine applications, coastal construction, and chemical processing facilities. It resists pitting corrosion from saltwater and harsh acids, ensuring longevity in environments where 304 would degrade. It is also preferred in food and pharmaceutical industries, where hygiene and corrosion resistance are paramount.

Heavy-Duty Design

These nuts feature thicker hexagonal walls compared to standard nuts, providing increased torque resistance and reducing the risk of stripping during installation. The threads are precision-rolled to ensure smooth engagement with bolts, minimizing friction and ensuring uniform clamping force. This design allows them to withstand high torque values without deformation, making them suitable for heavy machinery and structural applications.

Versatile Compatibility

Compatible with both metric bolts (M6 to M36) and a range of materials, these nuts excel in metal-to-metal connections—such as securing steel beams and flanges—and metal-to-wood applications, including fastening brackets to timber frames. In woodworking, their smooth threads reduce splitting, while their broad bearing surface distributes load evenly across the wood grain, preventing damage.

Long-Lasting Performance

Passivated or polished finishes enhance durability by removing surface contaminants and promoting the formation of a protective oxide layer. 304 stainless steel maintains its integrity in temperatures ranging from -200°C to +400°C, while 316 performs reliably from -60°C to +400°C. Both materials offer hardness levels of 200–300 HV, ensuring resistance to wear and deformation under prolonged use.

Compliance

DIN 934 certification guarantees that each nut meets strict dimensional standards, including thread pitch, hexagon width across flats, and height. This ensures interchangeability with bolts from different manufacturers, reducing compatibility issues on job sites. Additionally, both materials are non-magnetic (or weakly magnetic), making them suitable for applications where magnetic interference must be avoided, such as in electrical equipment.

Applications

Construction: Timber-frame homes use 304 stainless steel nuts to secure wooden beams, resisting moisture in basements and crawl spaces. Steel bridges employ 316 nuts in coastal areas to fasten joint plates, withstanding salt spray and humidity.

Marine: Boat builders use 316 nuts to fasten railings, deck hardware, and underwater fixtures, ensuring resistance to saltwater corrosion. Yacht interiors rely on their aesthetic appeal, with polished finishes complementing stainless steel fittings.

Chemical Industry: 316 nuts are used to assemble reaction vessels, pipelines, and storage tanks, resisting corrosion from acids, solvents, and caustic solutions. They are also employed in wastewater treatment plants, where exposure to chemicals and moisture is constant.

Food & Beverage: Breweries and dairies use 316 nuts to mount stainless steel equipment, meeting FDA standards for hygiene and corrosion resistance. Their smooth surfaces prevent bacterial buildup, ensuring compliance with food safety regulations.

Automotive: High-performance vehicles use these nuts to secure exhaust systems and engine components, withstanding high temperatures and vibration. Off-road vehicles employ them in suspension systems, ensuring reliability in dusty, muddy environments.