S-92210A585 5/16"-18 x 1 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh environments.
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding industrial applications.
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
• Fully threaded design and 82° countersink angle enable flush mounting and easy installation in various materials.
• Hex drive (3/16") allows for high-torque application with standard tools, reducing installation time and effort.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
• Rockwell B55 hardness offers excellent durability and resistance to wear under repetitive stress.

Professional Applications & Engineering Value

Engineered for heavy-duty use, these 5/16"-18 UNC flat head screws in 18-8 Stainless Steel address common industrial challenges such as corrosion, vibration, and high-stress conditions. The passivated finish enhances resistance to oxidation and chemical exposure, making them ideal for applications in marine, chemical processing, and outdoor equipment. With a coarse thread spacing and fully threaded design, they provide superior grip in soft materials and reduce the risk of stripping. The hex drive facilitates quick, secure installation in confined spaces, while the 82° countersink angle ensures a smooth, flush fit for aesthetic and safety purposes. These screws are trusted in machinery assembly, structural frameworks, and automotive components where reliability and compliance with ASME B18.3 standards are critical.

Specification Summary & Compliance

This product features precise Class 3A thread fit per UNC standards, ensuring tight tolerances for secure fastening. It adheres to ASME B18.3 manufacturing specifications, with dimensions including a 5/16"-18 thread size, 1-1/4" length, and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental safety requirements without compromising on performance.