S-92311A336 5/16"-18 x 7/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Maximum holding power ensured by the Class 3A thread fit, providing a precise, tight, and secure fastening.
• Easy installation and high torque capability with the 5/32" hex drive, preventing tool slippage and damage.
• Excellent resistance to loosening under vibration thanks to the cup point design that bites into the shaft for a firm grip.
• Enhanced durability and mechanical strength from Rockwell B80 hardness, suitable for heavy-duty applications.
• Broad industrial compatibility with UNC coarse threads, allowing for quick assembly and disassembly.
• Compliance with major industry and environmental standards including ASME B18.3, RoHS 3, and REACH for safe, reliable use.

Professional Applications & Engineering Value

This 5/16"-18 UNC Class 3A set screw is engineered to solve critical challenges in industrial settings where vibration resistance and secure component positioning are paramount. Made from 18-8 Stainless Steel, it offers excellent corrosion resistance, making it ideal for machinery, automotive assemblies, and outdoor equipment exposed to moisture. The cup point design provides a biting action that digs into the mating surface, preventing slippage and maintaining alignment in high-stress applications. With a hex headless and right-hand thread, it ensures easy installation in confined spaces using standard tools, while the coarse thread spacing facilitates quick adjustments. This set screw delivers reliable performance in securing gears, pulleys, and collars, reducing maintenance needs and enhancing operational safety in demanding engineering environments.

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 measures 7/16" in length with a 0.313" thread diameter and includes a 5/32" hex drive and cup point tip. Manufactured to meet ASME B18.3 specifications, it ensures dimensional accuracy and reliability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, supporting environmentally safe and regulated industrial use.