S-92158A119 4-40 x 1/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Precise thread engagement with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies
• High-strength performance backed by Rockwell B80 hardness, providing excellent durability under mechanical stress
• Easy installation and removal with 0.050" hex drive design, allowing secure tool engagement in confined spaces
• Optimized for industrial use with coarse UNC threads enabling quick assembly and reduced cross-threading risks
• Headless, flush-mount design maintains clean profiles in machinery where protruding fasteners are unsuitable
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this 4-40 UNC set screw delivers exceptional value in precision assemblies requiring corrosion-resistant fastening. The 316 stainless steel material provides superior performance in marine, chemical processing, and food-grade environments where moisture and corrosive agents degrade ordinary fasteners. Its Class 3A thread fit ensures tight tolerances for vibration-resistant connections in machinery, automotive components, and electronic enclosures. The hex drive configuration offers reliable torque transmission during installation, while the headless design enables flush mounting in rotating components and precision instruments. This combination of material properties and engineering precision addresses common industrial challenges including fastener failure, maintenance downtime, and regulatory compliance requirements.

Specification Summary & Compliance

This set screw maintains precision thread dimensions with UNC coarse threads and Class 3A fit per ASME B18.3 specifications. The manufacturing process ensures consistent thread diameter of 0.112" with proper thread spacing for reliable engagement. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility, while the Rockwell B80 hardness rating guarantees mechanical integrity across industrial applications.