S-94622A415 1/4"-28 x 1 9/32" AN4-12A Army-Navy Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from cadmium plating extends service life in harsh industrial and aerospace environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections with minimal risk of loosening.
• High hardness rating (Rockwell C26) provides excellent wear resistance and durability under repeated loads.
• External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Fine UNF threading offers better adjustment control and higher load distribution compared to coarse threads.
• Partial threading optimizes grip length for secure fastening in materials where full threading isn't required.

Professional Applications & Engineering Value

This 1/4"-28 UNF steel hex head screw is engineered to address critical challenges in industrial and aerospace applications where reliability and precision are non-negotiable. The cadmium plating provides a robust barrier against corrosion, significantly reducing maintenance needs in exposed or chemically aggressive settings. With its Class 3A thread fit and fine UNF threading, it ensures tight, secure fastening that resists vibration-induced loosening—common in machinery and structural assemblies. The partial threading and optimized grip length allow for controlled clamping force, making it ideal for components requiring precise load distribution. Manufactured to AN4-12A specifications, this screw meets stringent requirements for high-performance fasteners, delivering consistent quality and durability in mission-critical environments.

Specification Summary & Compliance

This screw adheres to AN4-12A specifications, with precise Class 3A thread fit and UNF fine threading for superior dimensional accuracy. It meets industry standards for inch system measurements, ensuring compatibility with existing designs. The cadmium-plated finish complies with common corrosion resistance requirements, while the material and manufacturing processes align with typical industrial and aerospace regulatory expectations for performance and safety.