S-92778A052 4-40 x 3/8" ASME B18.3 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 with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- High torque transmission enabled by the 0.050" hex drive, preventing tool slippage and ensuring secure fastening.
- Precise thread engagement with Class 3A fit, offering tighter tolerances for vibration resistance and secure locking.
- Excellent durability from Rockwell B80 hardness, providing wear resistance and maintaining thread integrity under stress.
- Space-saving headless design allows for flush mounting in applications where protrusion is not permitted.
- Reliable holding power with the oval tip, which minimizes surface damage while maintaining a firm grip on components.
- Broad industrial compliance meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
These 4-40 UNC set screws are engineered to address common industrial challenges such as component slippage, corrosion, and space constraints. Made from 18-8 stainless steel, they resist rust and chemical exposure, making them suitable for machinery, electronics, and automotive assemblies exposed to moisture or varying temperatures. The Class 3A thread fit and coarse UNC thread provide quick installation and high vibration resistance, reducing maintenance needs. The headless design with a 0.050" hex drive ensures easy access in tight spaces, while the oval tip offers secure fastening without marring surfaces. Ideal for securing gears, pulleys, and knobs, these screws deliver consistent performance in demanding industrial applications, backed by compliance with key standards.
Specification Summary & Compliance
This set screw features a 4-40 UNC thread size with Class 3A thread fit for precise dimensional accuracy, ensuring reliable performance in assembly. It adheres to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances.
