S-91793A111 4-40 x 9/16" ASME B18.6.3 Stainless Steel Binding Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Exceptional tensile strength rated at 100,000 psi, providing reliable fastening under high-stress industrial applications.
• Wide rounded binding head design offers secure seating and prevents pull-through in binding and electrical assembly tasks.
• Coarse UNC threads with Class 2A fit enable quick installation and strong holding power in various materials.
• Fully threaded right-hand design ensures maximum engagement and consistent clamping force along the entire 9/16" length.
• Slotted drive compatibility allows for easy manual assembly with standard tools, reducing installation time.
• Rockwell B100 hardness maintains thread integrity and resists wear during repeated use.

Professional Applications & Engineering Value

These 4-40 UNC rounded head slotted screws are engineered to address common industrial challenges such as material fatigue and environmental degradation. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making them ideal for binding applications in electronics, machinery, and outdoor equipment. The wide head profile distributes pressure evenly, reducing the risk of surface damage, while the coarse thread and Class 2A fit ensure quick, secure fastening in plastics, sheet metal, and wood. This design minimizes assembly errors and enhances productivity in high-volume manufacturing settings.

Specification Summary & Compliance

This screw features precise UNC coarse threads with a Class 2A tolerance for consistent fit and performance. It is manufactured in compliance with ASME B18.6.3 standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.