S-92210A361 1-64 x 1/4" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments.
• High-strength fastening with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance.
• Precise, secure thread engagement achieved through Class 3A thread fit and UNC coarse threads, minimizing the risk of cross-threading.
• Efficient installation and removal with a hex drive (0.050"), providing superior torque transfer and reducing tool slippage.
• Flush, professional finish enabled by the standard 82° countersink angle and flat head design for a smooth surface profile.
• Full-length threading ensures maximum grip and holding power along the entire 1/4" length of the screw.
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This 1-64 UNC Flat Head Screw is engineered to solve critical challenges in industrial assembly and precision machinery. The combination of 18-8 Stainless Steel and a passivated finish provides exceptional resistance to oxidation and chemical exposure, making it ideal for applications in manufacturing, electronics, and outdoor equipment where environmental durability is paramount. The hex drive design ensures high-torque installation without cam-out, while the Class 3A thread fit and coarse thread spacing facilitate quick assembly and robust vibration resistance. Its fully threaded body and 82° countersink angle allow for secure, flush mounting in pre-drilled holes, eliminating protrusions and enhancing both safety and aesthetics in finished products.

Specification Summary & Compliance

This screw adheres to Inch system dimensions with a 1-64 UNC thread size and Class 3A precision thread fit, ensuring dimensional accuracy and interchangeability. Manufacturing and quality are governed by the ASME B18.3 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in regulated industries.