S-92778A047 4-40 x 1/4" 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 industrial environments
- Exceptional holding power achieved through Class 3A thread fit for maximum assembly security
- Optimized torque transmission via 0.050" hex drive in headless design for space-constrained applications
- Enhanced grip and alignment with oval tip design and coarse UNC threading for reliable component positioning
- Consistent mechanical performance maintained through Rockwell B80 hardness rating
- Broad industry compatibility with right-hand thread direction and standardized 4-40 thread size
- Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards
Professional Applications & Engineering Value
This 4-40 UNC Class 3A set screw delivers critical engineering solutions for precision assembly challenges. The 18-8 Stainless Steel composition provides exceptional corrosion resistance, making it suitable for demanding environments where moisture or chemicals are present. The headless hex drive design with 0.050" drive size allows for installation in confined spaces while maintaining high torque capability. The coarse UNC threading combined with Class 3A thread fit ensures superior vibration resistance and holding power in dynamic applications. The oval tip configuration provides concentrated contact pressure for secure component positioning in machinery, automotive, and electronic assemblies where precise alignment is crucial for operational reliability.
Specification Summary & Compliance
This set screw maintains Class 3A thread fit tolerance with 4-40 UNC coarse threading and 1/4" length. Manufacturing conforms to ASME B18.3 specifications for dimensional accuracy and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications. Material certification includes Rockwell B80 hardness verification for consistent mechanical properties.
