S-90519A815 M8 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 durable, long-lasting fasteners.
• Secure left-hand thread engagement prevents loosening under counter-clockwise rotational forces, ensuring reliable performance in specialized machinery.
• Space-saving thin profile design (4mm height) allows for use in compact assemblies where standard nuts are too bulky.
• Precise Class 6H thread fit guarantees smooth, accurate mating with compatible bolts, reducing assembly time and risk of cross-threading.
• Multi-standard compliance (ASTM A108, DIN 439B, ISO 4035) ensures global interoperability and meets rigorous engineering specifications.
• Class 04 strength rating provides dependable load-bearing capacity for medium-duty applications without compromising weight.
• Regulatory assurance with RoHS 3 and REACH compliance, supporting environmentally conscious and safe manufacturing practices.

Professional Applications & Engineering Value

This M8 left-hand thread hex nut addresses critical challenges in industrial settings where reverse-thread mechanisms are essential to prevent unintended loosening from vibrational or rotational stress. Crafted from black-oxide steel, it offers superior oxidation resistance, extending service life in humid or corrosive conditions. The thin hex nut profile (13mm width, 4mm height) is engineered for space-constrained assemblies, such as precision equipment, automotive components, and machinery requiring coarse thread fastening. Its compliance with ASTM A108, DIN 439B, and ISO 4035 standards ensures consistent quality and compatibility, reducing downtime and maintenance costs. Ideal for applications like conveyor systems, rotating shafts, and specialized tools, this nut delivers reliable external hex drive performance for efficient installation and removal.

Specification Summary & Compliance

This nut features an M8 x 1.25 mm left-hand metric coarse thread with a Class 6H thread fit for precise tolerance. Dimensions include a 13 mm width and 4 mm height, adhering to ASTM A108, DIN 439B, and ISO 4035 manufacturing specifications. It is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead in steel and REACH (EC 1907/2006) compliant as of January 17, 2023, ensuring environmental and safety standards are met.