S-94355A141 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, ensuring long-term reliability in harsh industrial environments
- Maximum holding power achieved through Class 3A thread fit, providing precise engagement and vibration resistance
- Enhanced durability with Rockwell B80 hardness, maintaining structural integrity under repeated torque applications
- Secure installation via 0.050" hex drive design, preventing cam-out and enabling high-torque tightening
- Optimized for coarse threading with UNC specification, allowing faster assembly and reduced cross-threading risks
- Space-saving headless design ideal for flush-mounted applications where protrusion isn't feasible
- Right-hand thread direction ensures compatibility with standard assembly procedures and equipment
Professional Applications & Engineering Value
This 4-40 UNC 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 like marine equipment, food processing machinery, and outdoor industrial applications. The Class 3A thread fit ensures tighter tolerances than standard fasteners, eliminating play in sensitive mechanical systems where vibration-induced loosening can cause equipment failure. The hex headless design with 0.050" drive allows flush mounting in confined spaces while maintaining high torque transmission capability. These set screws are particularly valuable in precision instruments, automation equipment, and aerospace components where reliable, permanent fastening is non-negotiable.
Specification Summary & Compliance
This precision fastener maintains Class 3A thread fit tolerances per UNC specifications with coarse thread spacing for optimal engagement. Manufacturing complies with ASME B18.3 standards for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations regarding chemical safety. Additional specifications include 4-40 thread size, 3/8" length, right-hand thread direction, and flat tip configuration for concentrated surface contact.
