S-94622A411 1/4"-28 x 17/32" AN4-4A Army-Navy Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with cadmium plating, extending service life in harsh industrial environments
• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies
• AN4-4A specification compliance guarantees consistent quality and interchangeability in aerospace and defense applications
• External hex drive design enables high-torque installation with standard tools while resisting cam-out
• Rockwell C26 hardness maintains thread integrity and prevents stripping during repeated use
• Partial threading configuration allows for controlled clamping force distribution across joint surfaces

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 1/4"-28 UNF hex head screws solve critical fastening challenges where vibration resistance and mechanical reliability are paramount. The cadmium-plated steel construction provides essential corrosion protection while maintaining the 120,000 psi tensile strength required for structural assemblies. The fine thread spacing and Class 3A thread fit create superior engagement in precision machinery, automotive systems, and aerospace components, preventing loosening under dynamic loads. The external hex drive accommodates high installation torque without compromising head integrity, making these partially threaded screws ideal for applications requiring precise grip length control and consistent clamping force.

Specification Summary & Compliance

This inch system fastener features 1/4"-28 UNF threads with Class 3A precision tolerance, ensuring exact fitment in critical assemblies. Manufacturing complies with AN4-4A specifications for consistent dimensional accuracy and performance reliability. The cadmium plating meets industry standards for corrosion protection while maintaining electrical conductivity where required. Right-hand thread direction and fine thread spacing provide optimal engagement in materials requiring superior holding power.