S-91773A119 4-40 x 1 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Superior mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under high-stress conditions.
• Wide compatibility and easy installation provided by the standard UNC coarse thread and Class 2A fit, ensuring smooth assembly with common nuts and tapped holes.
• Secure and efficient fastening enabled by the Phillips No. 1 drive and fully threaded design, reducing installation time and preventing cam-out.
• Consistent dimensional accuracy with a 1-1/2" length and standard rounded head profile, guaranteeing precise fit in various applications.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
• Versatile right-hand threading for straightforward application across numerous industrial and assembly settings.

Professional Applications & Engineering Value

These 4-40 UNC coarse thread screws are engineered to address critical challenges in industrial fastening, such as vibration resistance and environmental durability. The 18-8 stainless steel material, combined with a passivated finish, provides excellent protection against corrosion and chemical exposure, making them ideal for use in machinery, electronics, and outdoor equipment. The fully threaded design and Phillips drive ensure quick, secure installation, reducing labor time and minimizing the risk of stripping. With a rounded head profile, these screws offer a flush fit that enhances safety and aesthetics in assembled products. Their high tensile strength and compliance with ASME B18.6.3 standards make them a reliable choice for demanding applications where precision and longevity are paramount.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including Class 2A thread fit and UNC coarse threading, ensuring consistent performance. It meets ASME B18.6.3 specifications for mechanical and dimensional requirements. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer applications without hazardous substances.