S-94495A201 4-40 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with Nylon Patch thread locker that maintains performance across extreme temperatures from -70° to 250°F
• Superior corrosion protection through Black-Oxide coating on Alloy Steel, extending service life in demanding industrial environments
• Precision thread engagement with Class 3A fit ensuring reliable, tight fastening and reduced risk of cross-threading
• High-strength durability from Rockwell C45 hardness, providing excellent resistance to wear and deformation under load
• Space-saving headless design allowing flush mounting where protruding fasteners aren't feasible
• Easy installation and removal with standardized 0.050" hex drive compatible with common industrial tools
• Coarse UNC threading enabling quick assembly and disassembly while maintaining strong holding power

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers exceptional engineering value in applications requiring reliable positional locking against rotation and axial movement. The Black-Oxide Alloy Steel construction provides superior corrosion resistance compared to standard steel fasteners, while the Nylon Patch locking mechanism eliminates the need for additional locking hardware in vibration-prone assemblies. The headless design with flat tip creates minimal protrusion, making it ideal for precision machinery, automotive components, and electronic enclosures where space constraints exist. With coarse UNC threading and Class 3A thread fit, installation is both rapid and precise, reducing assembly time while ensuring consistent clamping force in high-volume manufacturing environments.

Specification Summary & Compliance

This set screw features 4-40 UNC coarse threading with Class 3A precision tolerance for optimal fit and performance. Manufacturing complies with ASME B18.3 specifications and ASTM F912 standards for dimensional accuracy and material properties. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substance restrictions.