S-92210A349 5/16"-18 x 3/8" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ideal for harsh environments.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing in demanding applications.
• Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threading, reducing the risk of loosening under vibration.
• Efficient installation and removal with a 3/16" hex drive, providing a firm grip and minimizing tool slippage.
• Flush mounting capability due to the standard flat head profile and 82° countersink angle, creating a smooth surface finish.
• Durability in partial threading design, offering optimal grip where full threading isn't required, enhancing application versatility.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 5/16"-18 UNC flat head screw in 18-8 Stainless Steel is engineered to address common industrial challenges such as corrosion, vibration-induced loosening, and the need for robust, long-lasting fasteners. The passivated finish significantly enhances its resistance to rust and chemicals, making it suitable for outdoor, marine, or chemical processing equipment. With a Class 3A thread fit and coarse UNC threading, it ensures quick assembly and reliable holding power in materials like metal or hardwood, reducing maintenance downtime. The hex drive allows for high-torque applications without stripping, while the flat head design provides a sleek, embedded fit in countersunk holes, ideal for machinery, automotive assemblies, and structural frameworks where surface aesthetics and safety are priorities.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse thread specifications (5/16"-18). It is manufactured with a passivated finish and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.