S-90519A831 M5 ASTM A108, DIN 439B, ISO 4035 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, ideal for industrial environments requiring durability.
• Space-saving thin profile (2.7 mm height) allows for use in compact assemblies without compromising strength.
• Reliable left-hand threading prevents unintentional loosening in applications with counter-clockwise rotational forces.
• Precise fine thread pitch (0.5 mm) ensures secure, vibration-resistant connections in high-performance machinery.
• Class 04 strength rating provides consistent load-bearing capacity for general engineering and automotive uses.
• Global compliance with ASTM A108, DIN 439B, and ISO 4035 standards guarantees interchangeability and quality assurance.
• Environmental safety with RoHS 3 and REACH compliance, meeting stringent regulatory requirements for industrial components.

Professional Applications & Engineering Value

This M5x0.5mm thin hex nut in black-oxide steel addresses critical needs in precision assemblies where space constraints and rotational stability are paramount. The left-hand metric threading is engineered to secure components in systems with reverse rotational motion, such as certain machinery spindles or automotive parts, reducing the risk of accidental disassembly. Its fine thread spacing and Class 6H thread fit deliver superior clamping force and vibration resistance, essential for maintaining integrity in dynamic industrial environments. By conforming to ASTM A108, DIN 439B, and ISO 4035 standards, it ensures reliable performance in global supply chains, from manufacturing equipment to electronic enclosures, while the thin profile optimizes weight and material usage without sacrificing durability.

Specification Summary & Compliance

This fastener features an M5 thread size with a 0.5 mm fine pitch and Class 6H thread fit for precise metric applications. It adheres to manufacturing standards including ASTM A108, DIN 439B, and ISO 4035, ensuring dimensional accuracy and consistency. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) as of January 17, 2023, it meets environmental and safety regulations for industrial use.