S-91783A576 1/4"-20 x 5" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for reliable, heavy-duty load-bearing applications.
• Optimized for secure fastening through its partially threaded design and coarse UNC thread, providing excellent grip and resistance to loosening.
• Precision thread fit with Class 2A tolerance ensures smooth assembly and consistent performance in high-volume production.
• Broad industry compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH, guaranteeing quality and environmental safety.
• Versatile slotted drive and rounded head allow for straightforward installation and a clean, finished appearance in various assemblies.
• Durable right-hand thread design ensures compatibility with standard tools and common industrial fastening practices.

Professional Applications & Engineering Value

This 1/4"-20 x 5" rounded head slotted screw is engineered to address critical challenges in industrial settings, such as vibration resistance and environmental exposure. Constructed from 18-8 Stainless Steel with a passivated finish, it effectively combats corrosion, reducing maintenance needs in marine, chemical, and outdoor applications. The partially threaded and coarse UNC thread design enhances grip strength in softer materials and minimizes the risk of thread stripping, while the Class 2A thread fit ensures precise, repeatable installations. Ideal for machinery, structural frameworks, and equipment assembly, this screw delivers reliable performance under stress, supported by its high tensile strength and compliance with ASME B18.6.3, making it a trusted choice for engineers prioritizing durability and regulatory adherence.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy, ensuring consistent fit and function. It is manufactured in accordance with ASME B18.6.3 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for global industrial use without hazardous substances.