S-92423A436 4-40 x 3/8" FF-S-86, NAS1352N04-6, 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 and 120,000 psi yield strength for reliable performance in high-stress applications
• Superior corrosion resistance through A286 stainless steel material and passivated finish, extending service life in harsh environments
• Precision thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
• Optimized drive efficiency featuring 3/32" hex socket for maximum torque transmission and strip-resistant installation
• High-temperature capability maintained through Rockwell C33 hardness for stable performance in thermal cycling conditions
• Regulatory compliance assurance meeting Fed. Spec. FF-S-86, SAE AMS5737, RoHS 3, and REACH standards for quality and environmental safety
• Consistent dimensional accuracy with UNRC coarse threads and standard socket head profile for reliable interchangeability

Professional Applications & Engineering Value

This 4-40 socket head cap screw manufactured from A286 stainless steel addresses critical engineering challenges in aerospace, defense, and industrial equipment where high strength and corrosion resistance are paramount. The passivated finish provides enhanced protection against chemical exposure and atmospheric corrosion, while the Class 3A thread fit ensures precise engagement in tapped holes, reducing the risk of cross-threading and maintaining joint integrity under vibration. The 160,000 psi tensile strength and 120,000 psi yield strength make it suitable for structural applications where weight savings and reliability are critical. The 3/32" hex drive design allows for efficient installation in confined spaces, making it ideal for assemblies requiring frequent maintenance or disassembly.

Specification Summary & Compliance

This fastener features 4-40 UNRC coarse threads with Class 3A thread fit for precision engagement, 3/8" length, and standard socket head profile. Manufacturing complies with Fed. Spec. FF-S-86 (identified as NAS1352N04-6) and SAE AMS5737 material specifications. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental and substance restriction requirements.