S-92423A433 4-40 x 5/16" FF-S-86, NAS1352N04-5, SAE AMS5737 High-Strength A286 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio with 160,000 psi tensile strength and 120,000 psi yield strength for reliable performance in high-stress applications
• Superior corrosion resistance through A286 stainless steel construction and passivated finish, ensuring longevity in harsh environments
• Precision thread engagement with Class 3A fit and UNRC coarse threads for secure fastening and vibration resistance
• Optimized drive performance featuring standard socket head with 3/32" hex drive for high torque application and reduced cam-out risk
• Consistent mechanical properties backed by Rockwell C33 hardness for dimensional stability under load
• Full thread coverage along the 5/16" length for maximum grip and load distribution
• Regulatory compliance assurance meeting multiple aerospace and environmental standards for quality and safety

Professional Applications & Engineering Value

These A286 stainless steel socket head cap screws deliver critical performance advantages for demanding applications where failure is not an option. The passivated finish combined with the A286 material's inherent corrosion resistance provides exceptional protection against oxidation and chemical attack in aerospace, marine, and industrial environments. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of loosening under vibration while maintaining 160,000 psi tensile strength for high-load scenarios. The standard socket head design with 3/32" hex drive allows for compact installation in space-constrained assemblies while providing sufficient torque capability. These fully threaded 4-40 screws are particularly valuable in aerospace fastening applications where weight savings, reliability, and compliance with stringent specifications are paramount.

Specification Summary & Compliance

This socket head cap screw features precision 4-40 UNRC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufacturing complies with Fed. Spec. FF-S-86, NAS1352N04-5, and SAE AMS5737 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Mechanical properties include Rockwell C33 hardness and 160,000 psi tensile strength with 120,000 psi yield strength for consistent performance in critical applications.