S-90008A741 1/4"-20 x 1" ASME B18.3, ASTM F837 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with silver-plated 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions.
• Precise thread engagement with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections in industrial assemblies.
• Optimized drive efficiency featuring a standard hex socket head and 3/16" drive size for easy installation with standard tools and reduced cam-out risk.
• Full compliance with industry standards including ASME B18.3 and ASTM F837, guaranteeing consistent quality and dimensional accuracy.
• Environmental and safety adherence meeting RoHS 3 and REACH regulations, making them suitable for global supply chains and sensitive applications.
• Versatile fully-threaded design allowing for uniform clamping force along the entire 1" length, enhancing joint integrity.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these silver-plated 18-8 stainless steel socket head cap screws deliver outstanding corrosion resistance and durability, critical in applications exposed to moisture, chemicals, or extreme temperatures. The 1/4"-20 UNC coarse thread with a Class 3A fit provides rapid assembly and robust holding power, minimizing the risk of loosening in high-vibration machinery, automotive systems, and precision equipment. The hex drive socket head ensures easy access in confined spaces, while the high tensile strength supports heavy-load structures, reducing maintenance needs and downtime. Ideal for aerospace, marine, and manufacturing sectors, these fasteners offer long-term reliability and compliance with rigorous industry standards.

Specification Summary & Compliance

This product adheres to precise dimensional and performance criteria, including a Class 3A thread fit for tight tolerances, UNC coarse threads per ASME standards, and full compliance with ASME B18.3 and ASTM F837 specifications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for international markets. The screw is manufactured with consistent thread diameter of 0.25" and 1" length, backed by rigorous quality controls for reliable industrial use.