S-90272A581 5/16"-18 x 3/4" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments.
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration.
• Excellent drive engagement provided by the No. 4 Phillips drive, reducing cam-out and tool slippage.
• Optimized for rapid installation with UNC coarse threading and Class 2A fit, minimizing assembly time.
• Robust material integrity from Rockwell B70 hardness, resisting wear and deformation.
• Broad compatibility with standard 5/16"-18 nuts and tapped holes, simplifying parts sourcing.
• Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards.

Professional Applications & Engineering Value

This zinc-plated steel pan head screw is engineered to address common industrial challenges such as joint failure and corrosion. The fully threaded UNC coarse spacing provides superior grip and vibration resistance in materials like sheet metal, machinery frames, and automotive assemblies. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures that the fastener maintains clamp load under dynamic stresses, preventing loosening in high-vibration applications. The pan head design offers a low-profile, secure fit, while the Phillips drive allows for efficient installation with standard tools, making it ideal for production lines and maintenance operations where reliability and speed are critical.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread with Class 2A fit for consistent dimensional accuracy and easy assembly. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring interchangeability and performance. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.