S-94622A413 1/4"-28 x 25/32" AN4-6A Army-Navy Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with cadmium plating for extended service life in harsh industrial environments
• Precision assembly compatibility through Class 3A thread fit ensuring reliable, vibration-resistant connections
• Exceptional load-bearing capacity with 120,000 psi tensile strength for demanding mechanical applications
• Optimized grip and clamping force through partial threading design maximizing joint integrity
• Enhanced durability with Rockwell C26 hardness providing excellent wear resistance
• Industry-standard compliance meeting AN4-6A specifications for aerospace and defense applications
• Efficient installation and removal with external hex drive design for standard tool compatibility

Professional Applications & Engineering Value

Engineered for critical assembly applications where reliability is non-negotiable, this 1/4"-28 UNF steel hex head screw delivers exceptional performance in aerospace, defense, and heavy machinery sectors. The cadmium plated finish provides superior protection against galvanic corrosion and environmental degradation, while the Class 3A thread fit ensures precise engagement that maintains integrity under vibration and dynamic loads. The partial threading design concentrates clamping force where needed most, preventing joint loosening in high-stress applications. With 120,000 psi tensile strength and Rockwell C26 hardness, this fastener withstands extreme mechanical stresses while maintaining dimensional stability, making it ideal for structural assemblies requiring AN4-6A specification compliance.

Specification Summary & Compliance

This 1/4"-28 UNF hex head screw features precision Class 3A thread fit with right-hand fine threading, manufactured to AN4-6A specifications for aerospace and defense applications. The inch-system fastener maintains dimensional accuracy with 0.25" thread diameter and 15/32" thread length, while the cadmium plating meets industry standards for corrosion protection. The product complies with relevant industrial specifications for high-strength fasteners and maintains consistent performance across temperature variations and mechanical stresses.