S-91375A719 4-40 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 with Class 3A thread fit ensuring tight, reliable fastening in dynamic applications
- Enhanced corrosion protection from zinc plating, extending service life in harsh industrial environments
- High-strength durability with Rockwell C45 hardness alloy steel, resisting deformation under heavy loads
- Secure, flush installation thanks to the headless design and cup tip, preventing component interference
- Effortless installation and removal with 0.050" hex drive, compatible with standard tools for maintenance efficiency
- Wide compatibility with coarse UNC threading and right-hand direction, fitting common industrial assemblies
- Regulatory peace of mind meeting ASME B18.3, RoHS 3, and REACH for safe, compliant usage
Professional Applications & Engineering Value
This 4-40 UNC set screw is engineered to address critical challenges in precision assemblies, such as shaft collars, gears, and pulleys, where vibration-induced loosening can compromise system integrity. The zinc plated alloy steel construction provides a robust barrier against moisture and chemicals, reducing maintenance frequency in automotive, aerospace, and machinery sectors. With its headless design and cup tip, it delivers concentrated clamping force without protruding, ideal for confined spaces. The Class 3A thread fit and coarse UNC threading ensure rapid installation and high repeatability, streamlining production lines while the hex drive enables torque control for consistent performance in high-stress environments.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit tolerances per UNC standards, with a thread size of 4-40 and coarse spacing for optimal engagement. It meets ASME B18.3 manufacturing specifications, ensuring dimensional accuracy and reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it guarantees environmental safety and material restrictions adherence for global industrial use.
