S-93031A139 M20 DIN 439B, ISO 4035 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments
- Secure left-hand thread engagement prevents loosening in counter-rotational applications and specialized machinery
- Precision extra fine 1.5mm pitch delivers superior vibration resistance and finer adjustment capabilities
- Space-saving thin profile design (10mm height) enables installation in confined spaces without compromising strength
- Reliable Class 6H thread fit ensures consistent mating with bolts and reduces assembly issues
- Standardized external hex drive (30mm width) provides excellent tool accessibility and torque transmission
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications
Professional Applications & Engineering Value
This M20 left-hand thread hex nut solves critical engineering challenges in specialized industrial equipment. The 316 Stainless Steel material provides superior corrosion resistance against chlorides and chemicals, making it ideal for marine hardware, chemical processing equipment, and food processing machinery. The extra fine 1.5mm thread pitch offers enhanced vibration resistance in high-speed rotating assemblies, while the left-hand thread direction prevents accidental loosening in counter-clockwise rotating systems. The thin hex nut profile (DIN 439B) allows for installation in space-constrained applications where standard nuts cannot fit, maintaining full thread engagement and load distribution. These features combine to deliver reliable performance in demanding metric fastener applications requiring precision and durability.
Specification Summary & Compliance
This thin hex nut features M20 x 1.5mm left-hand metric threads with Class 6H thread fit tolerance for precision mating. Manufactured to DIN 439B and ISO 4035 standards, ensuring dimensional accuracy and interchangeability. The external hex drive measures 30mm across flats with 10mm height profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no substances of very high concern above threshold limits.
