S-92423A139 1/4"-20 x 3" ASME B18.3, NAS1352N4-48, SAE AMS5731, 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 due to A286 stainless steel material and passivated finish, extending service life in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
• Optimized drive efficiency featuring standard hex socket and 3/16" drive size for easy installation with standard tools
• Enhanced durability from Rockwell C33 hardness, maintaining structural integrity under repeated loads
• Versatile partial threading allowing both threaded and unthreaded sections for flexible clamping applications
• Regulatory compliance assurance meeting ASME, NAS, and SAE standards while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these A286 stainless steel socket head cap screws solve critical fastening challenges in aerospace, automotive, and heavy machinery sectors. The high-strength alloy composition combined with Class 3A UNRC coarse threads provides exceptional fatigue resistance where vibration and thermal cycling are concerns. The passivated finish creates a protective oxide layer that significantly enhances corrosion resistance in chemically aggressive environments. With 3-inch length and partially threaded design, these fasteners offer optimal clamp load distribution while the standard socket head profile ensures compatibility with existing tooling systems. These precision-machined screws deliver reliable performance in high-temperature applications where maintaining 160,000 psi tensile strength is critical for structural integrity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit ensuring tight tolerances per UNRC specifications. The 1/4"-20 coarse thread with right-hand direction provides optimal engagement characteristics. Compliance with ASME B18.3, NAS1352N4-48, and SAE AMS5731/5737 manufacturing standards guarantees consistent quality and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring suitability for global industrial applications.