S-93923A352 4-40 x 1/4" ASME B18.6.3 Stainless Steel Pan Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable performance under high stress
• Precision-engineered fit featuring Class 2A thread fit and UNC coarse threading for easier assembly and secure fastening
• Optimized for manual installation with a standard slotted drive and rounded pan head design for straightforward tool engagement
• Full threading along the 1/4" length ensures maximum grip and uniform clamping force across the entire fastener
• Compliance with industry standards including ASME B18.6.3, guaranteeing dimensional accuracy and interchangeability
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 4-40 UNC rounded pan head slotted screws provide a robust fastening solution where corrosion resistance and mechanical integrity are critical. The 316 Stainless Steel material, enhanced by a passivated finish, effectively resists chemical and atmospheric degradation, making these screws ideal for marine, chemical processing, and food-grade equipment. The coarse UNC thread and Class 2A fit facilitate quick installation and reduce cross-threading risks, while the slotted drive and pan head design offer compatibility with standard hand tools. With a high 80,000 psi tensile strength, they maintain clamp load in vibrating assemblies, ensuring long-term reliability in machinery, electronic enclosures, and structural applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse thread profile, manufactured in accordance with ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability. The inch system measurements, including a 1/4" length and fully threaded design, provide consistent performance and interchangeability in industrial fastener applications.