S-90251A310 M5 x 8 mm DIN 916, ISO 4029 Set Screws

Key Features & Benefits at a Glance

• Secure Vibration Resistance: Permanent nylon patch thread locker prevents loosening under dynamic loads, ensuring reliable performance in high-vibration environments.
• Superior Corrosion Resistance: Made from 18-8 stainless steel, offering excellent durability and rust resistance for long service life in harsh conditions.
• Precise Thread Engagement: Class 6g thread fit provides consistent, accurate mating with nuts and threaded holes, reducing assembly issues and improving joint integrity.
• High Torque Application Capability: 2.5mm hex socket drive allows for high tightening torque with standard tools, minimizing strip-out and enabling secure fastening.
• Wide Temperature Tolerance: Nylon locker functions effectively from -50° to 250°F, maintaining locking performance in diverse thermal operating conditions.
• Enhanced Grip and Alignment: Cup point design concentrates pressure for a firm bite into the shaft, preventing slippage and improving component alignment.
• Regulatory Compliance Assurance: Meets DIN 916/ISO 4029 standards and is RoHS 3 & REACH compliant, ensuring safety and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This M5 set screw with a nylon patch thread locker is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and misalignment. The 18-8 stainless steel construction provides robust corrosion resistance, ideal for machinery, automotive, and electronics exposed to moisture or chemicals. Its cup point ensures maximum grip on shafts and collars, preventing rotational slip in power transmission systems. The Class 6g thread fit and coarse thread spacing facilitate quick, reliable installation with standard hex socket drivers, reducing downtime. By combining high hardness (Rockwell B80) with a temperature-resistant locker, this fastener delivers long-term reliability in demanding applications, from motor mounts to precision equipment.

Specification Summary & Compliance

This metric set screw features M5x0.8mm coarse threads with a Class 6g thread fit for precise dimensional accuracy per ISO standards. It complies with DIN 916/ISO 4029 manufacturing specifications and includes certifications for RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety regulations. The right-hand thread direction and headless design align with common industrial practices for secure, flush installations.