S-94115A575 5/16"-18 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide finish on Alloy Steel, extending service life in harsh industrial environments.
• Precise, secure fastening achieved through Class 3A thread fit and UNC coarse threads, minimizing loosening under vibration.
• Non-marring, vibration-resistant locking provided by the Nylon 6/6 plastic tip, protecting sensitive surfaces without damaging assemblies.
• High mechanical strength with Rockwell C28 hardness, ensuring reliable performance under heavy loads and repeated use.
• Wide temperature tolerance from -50° to 250°F, maintaining tip integrity and function across diverse operating conditions.
• Easy installation and removal with 5/32" hex drive and headless design, ideal for confined spaces and streamlined assembly processes.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, globally accepted industrial use.

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address critical challenges in precision machinery and assembly lines, where vibration-induced loosening and surface damage are common concerns. The Black-Oxide Alloy Steel construction provides enhanced durability against wear and environmental exposure, while the Nylon 6/6 plastic tip offers a soft, resilient contact point that prevents scoring on shafts, gears, and collars. Its Class 3A thread fit and coarse UNC threads ensure tight tolerances and rapid installation, reducing assembly time and improving operational reliability in automotive, aerospace, and heavy equipment applications. The combination of high Rockwell C28 hardness and a broad temperature range from -50° to 250°F makes it suitable for both high-stress and thermally variable environments, delivering consistent holding power without compromising component integrity.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for precise dimensional accuracy and features 5/16"-18 UNC coarse threads with a right-hand direction. It is manufactured in compliance with ASME B18.3 standards and is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory acceptance in industrial markets.