S-90519A822 M20 ASTM A108, DIN 439B, ISO 4035 Hex Nuts
Hex Nuts
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with black-oxide steel coating for extended service life in demanding industrial environments
- Secure left-hand thread engagement prevents loosening under counter-clockwise rotational forces in specialized machinery
- Space-saving thin profile design (10mm height) enables installation in confined spaces without compromising strength
- Reliable Class 04 strength rating ensures consistent performance under mechanical stress and vibration
- Precision Class 6H thread fit provides smooth assembly and uniform load distribution
- Multi-standard compliance (ASTM A108, DIN 439B, ISO 4035) guarantees global interoperability and quality assurance
- Regulatory compliance ready with RoHS 3 and REACH certification for environmentally responsible sourcing
Professional Applications & Engineering Value
This left-hand thread hex nut delivers critical engineering solutions for applications requiring reverse-threading security. The black-oxide steel construction provides superior corrosion protection while maintaining the structural integrity needed for high-vibration environments like rotating machinery, conveyor systems, and automotive assemblies. The thin profile metric nut (M20x2.5mm) enables compact designs without sacrificing clamping force, making it ideal for space-constrained industrial equipment. With its coarse thread pitch and Class 6H thread fit, this fastener ensures rapid installation and reliable performance in maintenance-critical applications where left-hand threading prevents accidental disassembly.
Specification Summary & Compliance
Manufactured to precise metric dimensions (30mm width × 10mm height) with Class 6H thread tolerance for consistent mating compatibility. Complies with ASTM A108, DIN 439B, and ISO 4035 manufacturing standards. Meets RoHS 3 (2015/863/EU) compliance with exemption 6(a) and REACH (EC 1907/2006) requirements for hazardous substance control. The Class 04 strength rating confirms mechanical performance specifications for industrial fastener applications.
