S-92210A336 1/4"-28 x 1" 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, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, high-stress applications.
• Precise, secure fastening ensured by Class 3A thread fit and fine UNF thread spacing, minimizing loosening under vibration.
• Efficient installation and flush seating with a standard 82° countersink angle and 5/32" hex drive for easy, low-profile assembly.
• Full thread engagement along the 1" length provides maximum grip and load distribution in materials.
• Broad industry compliance with ASME B18.3 standards, RoHS 3, and REACH, ensuring quality and environmental safety.
• Right-hand threading for standard assembly processes, enhancing usability across various industrial setups.

Professional Applications & Engineering Value

Engineered for demanding environments, these 1/4"-28 UNF flat head screws in 18-8 stainless steel address critical challenges like corrosion, vibration, and high tensile loads. The passivated finish significantly enhances corrosion resistance, making them suitable for outdoor, marine, and chemical-exposed applications. With a Class 3A thread fit and fine thread spacing, they provide superior holding power and resistance to loosening in dynamic machinery, automotive assemblies, and precision equipment. The flat head design with an 82° countersink allows for seamless, flush mounting, reducing aerodynamic drag and improving aesthetic integration in consumer electronics and aerospace components. These screws deliver reliable performance where material integrity and regulatory compliance are paramount.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNF standards, with a thread size of 1/4"-28 and fine spacing. Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.