S-92311A578 5/16"-18 x 1/2" 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 extended service life
• Exceptional holding power ensured by Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
• High-strength durability from Rockwell B80 hardness, providing reliable performance under mechanical stress
• Easy installation and removal with 5/32" hex drive, allowing for efficient assembly and maintenance with standard tools
• Enhanced grip and alignment from the cup tip design, minimizing component slippage and improving positional accuracy
• Broad industry compatibility due to UNC coarse threads, facilitating quick assembly and disassembly in various setups
• Regulatory peace of mind with compliance to RoHS 3 and REACH, meeting global environmental and safety standards

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion degradation. The 18-8 stainless steel material offers excellent resistance to rust and chemicals, making it suitable for machinery, automotive, and outdoor equipment exposed to moisture or aggressive substances. Its Class 3A thread fit and coarse UNC threads provide a tight, precise engagement that withstands dynamic loads, reducing maintenance downtime. The headless design and cup tip ensure flush mounting and firm contact on shafts or collars, preventing rotational slip in power transmission systems. By meeting ASME B18.3 specifications, it guarantees dimensional consistency and reliability for engineers prioritizing safety and longevity in their designs.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads with a 5/16"-18 size. It conforms to ASME B18.3 manufacturing specifications, ensuring consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe industrial use.