S-94622A417 1/4"-28 x 2 1/32" AN4-20A Army-Navy Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure
• Superior corrosion resistance from cadmium plating extends service life in harsh industrial environments and outdoor applications
• Precise Class 3A thread fit provides tighter tolerances for improved vibration resistance and secure fastening in critical assemblies
• Rockwell C26 hardness rating offers excellent durability and wear resistance for repeated use in demanding applications
• External hex drive design allows for easy installation and removal with standard tools, reducing assembly time and labor costs
• AN4-20A specification compliance ensures consistent quality and interchangeability in aerospace and military applications
• Fine thread spacing delivers enhanced clamping force distribution and improved resistance to loosening under dynamic loads

Professional Applications & Engineering Value

This 1/4"-28 UNF steel hex head screw delivers critical engineering solutions where precision and reliability are paramount. The combination of cadmium plating and Class 3A thread fit addresses common industrial challenges including corrosion-induced degradation and vibration-induced loosening. The partially threaded design with specific grip length provides optimal clamping force concentration, making it ideal for aerospace components, heavy machinery assemblies, and structural applications requiring precise load distribution. With 120,000 psi tensile strength and Rockwell C26 hardness, this fastener maintains integrity in high-stress environments while the external hex drive ensures efficient installation in confined spaces common in industrial equipment maintenance and manufacturing applications.

Specification Summary & Compliance

This hex head screw features precise Class 3A thread fit with 1/4"-28 UNF fine threading and right-hand thread direction. Manufactured to AN4-20A specification with Rockwell C26 hardness and 120,000 psi tensile strength. The inch system measurement ensures dimensional accuracy with 2 1/32" length and 1 9/16" grip length. The cadmium plated finish provides corrosion protection while maintaining compliance with industrial fastener standards for reliable performance in critical applications.