S-94622A221 5/16"-24 x 27/32" AN5-6 Cotter Pin-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with cadmium-plated steel coating, extending service life in harsh industrial environments.
• Exceptional tensile strength rated at 120,000 psi, ensuring reliable performance under high-stress applications.
• Precise Class 3A thread fit for secure, vibration-resistant assemblies in critical aerospace and machinery components.
• Integrated cotter pin hole (1/16") enables positive mechanical locking, preventing unintended loosening in dynamic systems.
• External hex drive design allows for high-torque installation and easy maintenance with standard tools.
• Fine UNF thread spacing provides improved load distribution and enhanced clamping force retention.
• AN5-6 specification compliance guarantees interchangeability and reliability for regulated aerospace and defense applications.

Professional Applications & Engineering Value

This 5/16"-24 UNF hex head screw is engineered with cadmium-plated steel to combat corrosion in demanding environments like aerospace assemblies, heavy machinery, and transportation equipment. The Class 3A thread fit and fine thread spacing ensure tight, vibration-resistant connections critical for safety and longevity. Its partial threading and integrated cotter pin locking mechanism provide fail-safe security in high-vibration applications, reducing maintenance downtime. With a Rockwell C26 hardness and optimized grip length, it delivers consistent clamping force and fatigue resistance, making it ideal for AN5-6 spec compliant uses where precision and durability are non-negotiable.

Specification Summary & Compliance

This fastener adheres to UNF thread standards with a Class 3A thread fit for precise dimensional accuracy. It meets AN5-6 specifications for aerospace and industrial applications, ensuring compatibility with established engineering requirements. The cadmium plating offers environmental protection while maintaining RoHS and REACH compliance for restricted substance control. Manufacturing follows strict quality controls to uphold the stated tensile strength (120,000 psi) and thread diameter (0.3125"), providing reliable performance in regulated sectors.