S-91375A580 5/16"-18 x 5/8" 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 corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
- Exceptional holding power and vibration resistance provided by the cup tip design, ensuring components stay securely locked in place.
- High-strength construction with a Rockwell C45 hardness rating for reliable performance under heavy loads and stress.
- Precise and secure fastening from the Class 3A thread fit, offering tighter tolerances for improved assembly reliability.
- Easy installation and removal using a standard 5/32" hex key, facilitating efficient maintenance and adjustments.
- Broad industrial compliance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards for safe and regulated use.
- Optimized for high-vibration applications with coarse UNC threads and right-hand direction, providing quick assembly and strong grip.
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw is engineered to address critical challenges in machinery and equipment assembly, where vibration loosening and corrosion are common failures. The black-oxide alloy steel construction provides a durable barrier against moisture and chemicals, significantly reducing maintenance needs. Its headless design and hex drive allow for flush mounting in confined spaces, while the cup tip bites into shafts and collars to prevent slippage. Ideal for securing gears, pulleys, and other rotating components in automotive, aerospace, and heavy machinery, this screw ensures long-term reliability and Class 3A thread fit precision, minimizing downtime and enhancing operational safety.
Specification Summary & Compliance
This set screw adheres to UNC coarse thread standards with a 5/16"-18 size and Class 3A thread fit for high precision. It meets ASME B18.3 and ASTM F912 manufacturing specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and restricted substance control.
