S-92311A108 4-40 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Exceptional thread precision with Class 3A fit ensures secure, vibration-resistant fastening in critical applications
• Maximum torque transmission through the 0.050" hex drive design prevents stripping during installation
• Enhanced holding power with cup point tip that bites into materials for permanent, slip-resistant positioning
• Optimized mechanical strength with Rockwell B80 hardness providing reliable durability under heavy loads
• Industry-standard compatibility through UNC coarse threading for easy installation and replacement
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers exceptional engineering value for precision assembly applications where space constraints and vibration resistance are critical concerns. The 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for machinery, electrical enclosures, and automotive components exposed to moisture or chemicals. The hex headless design with 0.050" drive size allows for flush mounting in confined spaces while maintaining high torque capability. The cup point tip creates permanent seating by biting into shaft materials, preventing rotational slippage in pulleys, gears, and collars. With Class 3A thread fit and coarse thread spacing, this right-hand thread set screw ensures rapid installation and reliable performance in high-vibration industrial environments where maintaining precise component alignment is essential.

Specification Summary & Compliance

This precision set screw features 4-40 UNC coarse thread spacing with Class 3A thread fit for superior dimensional accuracy and tight tolerances. The 3/8" length and 0.112" thread diameter provide consistent performance across applications. Manufacturing complies with ASME B18.3 specifications for dimensional standards and quality assurance. Environmental compliance includes RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring suitability for global industrial markets and environmentally conscious manufacturing operations.