DIN 934 Hex Nut vs DIN 935 Nuts Castle Nut

Choosing the right nut in mechanical fasteners is critical for both structural stability and operational safety. The DIN 934 Hex Nut and DIN 935 Castle Nut are two commonly used types, each with distinct differences in design, anti-loosening performance, and application scenarios.

As a professional fastener nut manufacturer, Xinchi Fasteners is pleased to share a detailed comparison to help engineers and buyers make informed decisions.

DIN 934 Hex Nut Overview

The DIN 934 Hex Nut is the standard, widely used six-sided nut in machinery, construction, and industrial applications. Its hexagonal design allows for easy installation with standard wrenches and offers broad compatibility with various bolts.

Hex nuts primarily rely on thread friction for fastening. While installation is quick and cost-effective, hex nuts can loosen under high vibration or dynamic loads. To improve anti-loosening performance, additional measures such as spring washers, nylon lock nuts, or thread-locking compounds may be required.

In general, DIN 934 Hex Nuts provide convenience and versatility for everyday applications but have limited intrinsic safety in high-vibration or critical environments.

DIN 935 Castle Nut Overview

The DIN 935 castle nut (also known as a slotted nut) enhances the basic hex nut design with a slotted top. This allows a cotter pin to be inserted through the nut and bolt hole, creating a mechanical lock that prevents rotation.

Castle Nuts are widely used in automotive wheel hubs, machinery shafts, and critical engineering applications where high safety and anti-loosening reliability are required. With mechanical locking, castle nuts remain secure even under extreme vibration, offering significantly higher safety compared to standard hex nuts.

Safety and Anti-Loosening Comparison: DIN 934 vs DIN 935

Safety and anti-loosening performance are key criteria when selecting a nut. The DIN 934 Hex Nut relies on thread friction and supplemental locking measures, providing moderate anti-loosening capability. In contrast, the DIN 935 Castle Nut uses mechanical locking via a cotter pin, achieving superior resistance to vibration and rotational forces.

For applications in high-vibration or critical safety environments, DIN 935 Castle Nuts provide higher reliability and minimize the risk of failure. DIN 934 Hex Nuts remain suitable for standard, low-vibration applications where additional locking is not critical.

Application Scenarios: DIN 934 vs DIN 935 Nuts

DIN 934 Hex Nuts are suitable for general mechanical structures, industrial equipment with low vibration, and routine assembly tasks. Their advantages include low cost and easy installation.

DIN 935 Castle Nuts are preferred for automotive hubs, machinery shafts, bridges, and other high-vibration or safety-critical assemblies. Their mechanical locking ensures components remain secure, even under dynamic loads.

Choosing the correct nut depends on operational vibration, load requirements, and safety standards, not just on the fastener itself.

Advantages of Xinchi Fastener Factory

Xinchi Fastener Factory is a professional manufacturer specializing in high-quality nuts, including DIN 934 Hex Nuts and DIN 935 Castle Nuts. Our advantages include:

• Extensive Manufacturing Experience: Years of expertise in producing standard and customized nuts with precise specifications.
• Material Variety: Carbon steel, stainless steel, and alloy steel options to meet different strength and corrosion-resistance requirements.
• High Precision Production: Advanced cold heading, threading, and machining ensure dimensional accuracy and thread quality.
• Strict Quality Control: Every nut undergoes full inspection to meet DIN standards, ensuring safety and reliability.
• Fast Delivery Capability: High daily production and sufficient stock to fulfill both bulk orders and custom requirements.

Xinchi is a trustworthy fastener company, especially in furniture nuts. We have a factory,  founded in 2007. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, XINCHI offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers.

Xinchi Fastener Factory provides reliable, high-performance fasteners to ensure mechanical assemblies are stable, safe, and long-lasting. If you would like to learn more about fasteners or are interested in wholesale fasteners, please do not hesitate to contact us. Our experienced and expert service team will reply as soon as possible.