S-94115A574 5/16"-18 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Secure Anti-Loosening Performance – Green nylon 6/6 plastic tip provides vibration resistance and prevents surface damage, maintaining assembly integrity in dynamic applications.
• Exceptional Corrosion Resistance – Black-oxide finish on alloy steel enhances durability and protects against rust in harsh industrial environments.
• Precision Thread Engagement – Class 3A thread fit ensures tight, reliable fastening with minimal risk of cross-threading or stripping.
• High-Temperature & Low-Temperature Suitability – Nylon tip operates reliably from -50° to 250° F, making it ideal for applications with thermal cycling.
• Easy Installation in Confined Spaces – Headless design with 5/32" hex drive allows for flush mounting and tool access in tight assemblies.
• Superior Mechanical Strength – Rockwell C28 hardness provides excellent wear resistance and load-bearing capacity under stress.
• Broad Industrial Compliance – Meets ASME B18.3 standards and is RoHS 3 & REACH compliant for global supply chain compatibility.

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address common industrial challenges such as component slippage, vibration-induced loosening, and corrosion in demanding environments. The black-oxide alloy steel construction offers enhanced resistance to wear and environmental factors, while the coarse UNC thread and Class 3A fit ensure quick, precise installation with high clamping force. The green nylon 6/6 plastic tip acts as a locking element, preventing marring on shafts, gears, and collars—ideal for machinery, automotive, and precision equipment where right-hand thread fasteners are specified. Its headless, hex drive design simplifies maintenance and allows use in space-constrained assemblies, reducing the need for custom solutions.

Specification Summary & Compliance

This set screw features a 5/16"-18 UNC coarse thread with Class 3A thread fit for high precision and a length of 1/4". It complies with ASME B18.3 manufacturing standards and is verified to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety regulations.