S-94105A312 5-40 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish, extending service life in demanding industrial environments
• Exceptional holding power achieved through Class 3A thread fit precision, ensuring secure fastening in critical assemblies
• High-strength performance from alloy steel construction with Rockwell C45 hardness, resisting deformation under heavy loads
• Space-saving headless design with 1/16" hex drive, enabling installation in confined spaces while maintaining tool engagement
• Reliable coarse threading (UNC) with flat tip design, providing maximum surface contact and vibration resistance
• Industry-standard compliance meeting ASME B18.3 specifications, ensuring interchangeability and engineering consistency
• Environmental regulation adherence with RoHS 3 and REACH compliance, suitable for global manufacturing requirements

Professional Applications & Engineering Value

Engineered for precision industrial applications, these 5-40 UNC set screws deliver exceptional performance in machinery, automotive components, and precision instruments. The black-oxide alloy steel construction provides superior corrosion resistance, significantly reducing maintenance requirements in humid or chemically aggressive environments. The Class 3A thread fit ensures tight tolerances for vibration-resistant assemblies, while the headless design with 1/16" hex drive allows installation in space-constrained applications without compromising torque transmission. The coarse UNC threading combined with flat tip configuration creates optimal clamping force distribution, preventing component slippage in high-stress applications. These set screws are particularly valuable for permanent assemblies requiring reliable, long-term fastening solutions with minimal maintenance intervals.

Specification Summary & Compliance

This set screw maintains Class 3A thread fit precision with 5-40 UNC coarse threading and 0.125" thread diameter. Manufacturing conforms to ASME B18.3 specifications where applicable per ASTM F912. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components. The 3/16" length and flat tip design provide consistent performance across precision engineering applications requiring reliable set screw solutions.