S-94622A245 1/2"-20 x 2 3/32" AN8-20 Cotter Pin-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with cadmium-plated steel construction for extended service life in harsh environments
• Precise Class 3A thread fit ensures secure, vibration-resistant connections in critical assemblies
• High tensile strength (120,000 psi) provides reliable performance under extreme mechanical loads
• External hex drive design allows for easy installation and removal with standard tools
• Integrated cotter pin locking mechanism prevents accidental loosening in high-vibration applications
• AN8-20 specification compliance guarantees consistent quality and interchangeability in aerospace and industrial systems
• Rockwell C26 hardness rating maintains thread integrity and resistance to wear over repeated use cycles

Professional Applications & Engineering Value

This 1/2"-20 UNF hex head screw delivers exceptional engineering value through its cadmium-plated steel construction and Class 3A thread fit. The combination of 120,000 psi tensile strength and fine thread spacing creates a fastener capable of withstanding extreme vibration and dynamic loads in demanding applications. The external hex drive provides superior torque transmission during installation, while the cotter pin locking feature eliminates the risk of rotational loosening in critical assemblies. Particularly suited for aircraft specifications and heavy machinery, this partially threaded design allows for precise clamping force distribution across the 1 5/16" grip length, making it ideal for structural connections where reliability is paramount.

Specification Summary & Compliance

Manufactured to AN8-20 specifications with Class 3A thread fit precision in the inch system. Features UNF fine threads with right-hand direction and 0.5" thread diameter. Mechanical properties include Rockwell C26 hardness and 120,000 psi tensile strength. The partially threaded design incorporates a 0.106" hole diameter for 3/32" cotter pins, ensuring secure locking capability. Complies with relevant industrial standards for heavy-duty fasteners in aerospace and mechanical applications.