S-93031A131 M5 DIN 439B, ISO 4035 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in harsh environments thanks to 316 stainless steel construction
• Secure left-hand thread locking prevents loosening in applications with counter-clockwise rotational forces
• Space-saving thin profile allows for use in compact assemblies and tight spaces where standard nuts won't fit
• Precision Class 6H thread fit ensures reliable engagement and consistent clamping force with mating components
• Guaranteed dimensional accuracy through compliance with DIN 439B and ISO 4035 international standards
• Enhanced chemical resistance from 316 stainless steel provides excellent performance in corrosive industrial settings
• Environmental compliance assurance with RoHS 3 and REACH regulations for global market acceptance

Professional Applications & Engineering Value

This M5 left-hand thread hex nut delivers critical engineering value in applications where reverse-threading mechanisms prevent accidental loosening. The 316 stainless steel construction offers exceptional resistance to chemicals, saltwater, and industrial corrosives, making it ideal for marine equipment, chemical processing machinery, and food processing applications. The thin hex nut profile (2.7mm height) solves space constraint challenges while maintaining full external hex drive functionality for standard tool engagement. The fine metric thread (0.5mm pitch) provides superior vibration resistance and precise adjustment capabilities in precision assemblies. These left-hand thread nuts are engineered specifically for rotating components where conventional right-hand threads would naturally unscrew, ensuring operational safety and reliability in demanding industrial environments.

Specification Summary & Compliance

This thin hex nut features M5 x 0.5mm left-hand metric fine threads with Class 6H thread fit tolerance according to ISO standards. Manufacturing complies with DIN 439B and ISO 4035 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. External hex drive measures 8mm across flats with a total height of 2.7mm, maintaining the standardized thin profile dimensions while providing reliable torque transmission.