S-92239A400 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Tool-free installation and removal with wing-shaped head design for rapid assembly/disassembly in tight spaces
• Enhanced load distribution and stability through 3/4" flat flange that prevents loosening under vibration
• Superior corrosion resistance with black zinc alloy coating for extended service life in harsh industrial environments
• Reliable thread engagement with Class 2B precision fit ensuring consistent performance in repetitive applications
• Quick visual identification of right-hand threading direction to prevent cross-threading during installation
• Optimized for coarse-thread applications with 5/16"-18 UNC threads providing faster assembly and better debris resistance
• Durable construction maintaining structural integrity under repeated hand-tightening cycles

Professional Applications & Engineering Value

This flanged thumb nut solves critical challenges in maintenance-heavy environments where tool access is limited. The black zinc alloy construction provides essential corrosion protection for outdoor equipment, electrical enclosures, and machinery subjected to moisture or chemical exposure. The 3/4" flat flange distributes clamping force over a wider surface area, preventing damage to soft materials and maintaining secure connections in high-vibration applications like automotive assemblies, conveyor systems, and portable equipment. The UNC coarse threads enable faster installation than fine-thread alternatives while resisting jamming from debris accumulation. This combination of features makes it ideal for tool-free fastening in industrial maintenance, manufacturing fixtures, and equipment requiring frequent adjustment or service access.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit ensuring consistent engagement with mating components. Features 5/16"-18 UNC coarse threads with right-hand direction conforming to ASME/ANSI standards. The 3/4" flange diameter and 0.04" flange thickness provide optimal bearing surface while maintaining compact 1/2" height profile. Compliant with RoHS and REACH environmental standards for industrial use.