S-94622A214 1/4"-28 x 1 1/32" AN4-10 Cotter Pin-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through cadmium plating, extending service life in harsh industrial environments
• Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C26 hardness for heavy-duty applications
• Precision thread engagement with Class 3A fit ensuring reliable, vibration-resistant connections
• Secure locking mechanism via cotter pin hole design preventing accidental loosening under dynamic loads
• Optimized torque transmission through external hex drive design for efficient installation and removal
• Controlled thread engagement with partial threading for precise clamp load distribution
• Industry-standard compliance meeting AN4-10 specifications for aerospace and defense applications

Professional Applications & Engineering Value

This cadmium-plated steel hex head screw delivers critical performance in demanding environments where vibration resistance and mechanical integrity are paramount. The Class 3A thread fit provides superior dimensional accuracy for precision assemblies, while the fine UNF threading offers enhanced load distribution compared to coarse threads. The cotter pin locking mechanism addresses common failure points in rotating equipment and structural applications by preventing rotational loosening. With partial threading optimizing grip length control, this fastener is engineered for critical joints in aerospace assemblies, heavy machinery, and transportation equipment where safety and reliability cannot be compromised. The combination of high tensile strength and corrosion-resistant plating ensures long-term performance in both standard and severe service conditions.

Specification Summary & Compliance

Manufactured to exacting AN4-10 specifications with Class 3A thread fit tolerances for precision applications. Features 1/4"-28 UNF fine threads with right-hand orientation and 0.25" thread diameter. Critical dimensions include 1-1/32" total length with 9/16" grip length and 15/32" thread length. The cotter pin hole accommodates standard 1/16" diameter pins with 0.076" hole diameter. Mechanical properties include 120,000 psi tensile strength and Rockwell C26 hardness. Compliant with relevant industrial standards for aerospace and defense applications.