S-91343A400 1/2"-13 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments
• Reliable vibration resistance through serrated locking technology that prevents loosening under dynamic loads
• Enhanced load distribution with 1" flange diameter, reducing surface pressure and preventing material damage
• Precise thread engagement with Class 2B fit ensuring smooth installation and consistent clamping force
• Easy installation and removal using standard external hex drive compatible with common tools
• Durable coarse threading (UNC 1/2"-13) that resists cross-threading and maintains integrity in high-stress applications
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 316 stainless steel flange locknut addresses critical industrial challenges where vibration resistance and corrosion protection are paramount. The serrated locking mechanism creates permanent friction against mating surfaces, eliminating the need for secondary locking devices in machinery, transportation equipment, and structural assemblies. The integrated 1" flange distributes clamping force across wider areas, preventing surface damage to softer materials while maintaining joint integrity. With UNC coarse threading and Class 2B thread fit, this hex nut ensures rapid installation in high-volume production environments while providing reliable performance in chemical processing, marine applications, and outdoor infrastructure where environmental factors degrade ordinary fasteners.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit for consistent engagement. Features UNC 1/2"-13 coarse threads with right-hand direction and external hex drive. The 1" flange diameter and standard hex profile ensure compatibility with industry tools. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest substance restriction requirements for industrial components.