S-94355A717 5/16"-18 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Exceptional thread engagement and holding power provided by the coarse UNC thread profile and precise Class 3A fit, minimizing the risk of loosening under vibration.
• High-strength, durable performance ensured by a Rockwell B80 hardness rating, offering reliable resistance to wear and deformation.
• Secure, flush-mount installation with a headless and flat tip design, preventing protrusion and allowing for a clean, finished assembly.
• Easy and efficient installation/torquing using a standard 5/32" hex key, facilitating quick assembly and disassembly in confined spaces.
• Reliable compliance for global markets, meeting ASME B18.3 specifications and being RoHS 3 & REACH compliant.
• Versatile right-hand thread direction for standard assembly procedures across a wide range of machinery and equipment.

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A set screw is engineered to address critical challenges in industrial assembly, such as component slippage and corrosion-induced failure. The 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, making it suitable for applications exposed to moisture, chemicals, or varying temperatures. Its coarse thread design ensures faster installation and superior grip in softer materials or where high vibrational loads are present. The headless, hex drive configuration allows for a completely flush finish, which is essential for rotating parts and safety-critical assemblies where protrusions are not permissible. This combination of a high-precision Class 3A thread fit and robust Rockwell B80 hardness delivers a reliable, long-term fastening solution for pulleys, gears, knobs, and other mechanical components, reducing maintenance needs and enhancing operational safety.

Specification Summary & Compliance

This set screw features a 5/16"-18 UNC coarse thread with a Class 3A fit for high precision and strength. It adheres to the ASME B18.3 standard governing dimensional and mechanical requirements for socket set screws. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.