S-92210A077 2-56 x 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Superior mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening.
• Precision thread engagement with Class 3A fit and UNC coarse threads, ensuring secure installation and vibration resistance.
• Efficient installation and flush finish thanks to the hex drive (0.050") and standard 82° countersink angle for seamless surface alignment.
• Full threading along the 1/4" length provides maximum grip and uniform load distribution in assembled components.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
• Right-hand thread with coarse spacing enables quick assembly and disassembly, reducing maintenance time and labor costs.

Professional Applications & Engineering Value

These 2-56 UNC flat head screws are engineered to address critical challenges in precision machinery, electronics, and automotive assemblies where space constraints and material integrity are paramount. The 18-8 stainless steel material, enhanced by a passivated finish, resists oxidation and chemical exposure, extending service life in demanding conditions. The hex drive design allows for high-torque application without slippage, while the 82° countersink angle ensures a flush mount to prevent protrusions that could interfere with moving parts. With a Class 3A thread fit and coarse thread spacing, these screws provide robust clamping force and are less prone to cross-threading, reducing assembly errors and enhancing operational reliability in industrial applications.

Specification Summary & Compliance

This product adheres to Class 3A thread fit tolerances per UNC standards, with a thread size of 2-56 and coarse spacing. Manufacturing conforms to ASME B18.3 specifications, ensuring dimensional accuracy and performance consistency. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms the absence of hazardous substances, supporting safe use in global markets.