S-91735A301 4-40 x 1/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 Stainless Steel construction with passivated finish
• High-strength performance with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, long-lasting fastening
• Effortless installation provided by the Phillips No. 1 drive and rounded pan head design
• Secure thread engagement ensured by coarse UNC threads with Class 2A fit for consistent assembly
• Maximum grip and holding power from the fully threaded 1/8" length design
• Regulatory peace of mind with compliance to ASME B18.6.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These 4-40 UNC rounded head Phillips screws are engineered to solve critical fastening challenges in demanding industrial settings. The 316 Stainless Steel material, combined with a passivated finish, provides exceptional resistance to corrosion from chemicals, saltwater, and extreme temperatures, making them ideal for marine, chemical processing, and food industry applications. The coarse thread design and Class 2A thread fit ensure quick, reliable installation and vibration resistance, reducing the risk of loosening in high-stress assemblies. Their fully threaded construction and 80,000 psi tensile strength offer uniform clamping force and durability, essential for maintaining structural integrity in machinery, electronic enclosures, and precision equipment where ASME B18.6.3 standards are required.

Specification Summary & Compliance

These screws feature precise 4-40 UNC coarse threads with a Class 2A thread fit for consistent dimensional accuracy. They are manufactured in compliance with ASME B18.6.3 specifications and meet environmental standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring they are free from hazardous substances and suitable for global industrial use.