S-91375A123 5-40 x 3/16" ASME B18.3, ASTM F912 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior Vibration Resistance – Coarse UNC threads and Class 3A fit ensure tight, reliable fastening that resists loosening under dynamic loads.
- Exceptional Durability – Made from black-oxide alloy steel with Rockwell C45 hardness for long-lasting performance in demanding environments.
- Secure, Non-Slip Installation – 1/16" hex drive allows for high torque application without stripping, ensuring a firm grip.
- Effective Component Locking – Cup tip design concentrates pressure for a strong hold on shafts, collars, and pulleys.
- Corrosion-Resistant Finish – Black-oxide coating provides added protection against rust and wear, extending service life.
- Space-Saving Headless Design – Ideal for applications where a flush or low-profile installation is required.
- Broad Industrial Compliance – Meets ASME B18.3, RoHS 3, and REACH standards, ensuring safety and regulatory acceptance.
Professional Applications & Engineering Value
This 5-40 UNC set screw is engineered to address common industrial challenges such as component slippage and fastener fatigue. Its black-oxide alloy steel construction, combined with a Rockwell C45 hardness, provides excellent strength and wear resistance, making it suitable for high-stress applications in machinery, automotive assemblies, and precision equipment. The cup tip ensures concentrated clamping force, preventing movement in pulleys, gears, and couplings. With a 1/16" hex drive and Class 3A thread fit, it offers precise installation and reliable performance in right-hand thread systems, reducing maintenance needs and downtime in industrial settings.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision and consistent engagement. It conforms to ASME B18.3 specifications, ensuring dimensional accuracy and reliability. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and safe for various industrial applications.
