S-91735A866 1/4"-20 x 4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments where rust prevention is critical.
• High tensile strength of 80,000 psi ensures reliable load-bearing capacity and structural integrity in demanding industrial applications.
• Rockwell B85 hardness provides excellent durability and resistance to wear, reducing the need for frequent replacements.
• Passivated finish enhances surface protection against oxidation and extends the fastener's service life in corrosive conditions.
• Fully threaded UNC coarse thread design allows for faster installation and secure gripping in a wide range of materials.
• Class 2A thread fit ensures consistent, precision threading for easy assembly and reduced risk of cross-threading.
• Phillips drive (No. 3 size) offers common tool compatibility and efficient torque application during installation.

Professional Applications & Engineering Value

Engineered for maximum durability in harsh environments, these 316 stainless steel pan head screws address common industrial challenges such as corrosion-induced failure and mechanical stress. The fully threaded UNC coarse thread design provides superior holding power in materials like metal, plastic, and composites, while the passivated finish adds an extra layer of defense against chemicals and moisture. Ideal for applications in marine equipment, chemical processing plants, and outdoor structures, these screws deliver long-term reliability and reduce maintenance costs. Their compliance with ASME B18.6.3 standards ensures consistent quality and performance, making them a trusted choice for industrial fastening solutions where precision and corrosion resistance are paramount.

Specification Summary & Compliance

This 1/4"-20 x 4" pan head screw features a Class 2A thread fit with UNC coarse threading for precise dimensional accuracy. Manufactured in accordance with ASME B18.6.3 specifications, it meets rigorous industry standards for mechanical and dimensional properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence in global supply chains.