S-99117A870 1/4"-20 x 6" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and stress conditions
• Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
• Class 2A thread fit offers optimal assembly efficiency while maintaining secure fastening integrity
• Partially threaded design allows for precise clamping force control and material compression management
• Phillips drive with No. 3 size enables efficient installation with standard tools while reducing cam-out risk
• Coarse UNC threading ensures quick assembly and reliable performance in various materials

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel rounded head Phillips screws deliver exceptional performance in construction, machinery assembly, and structural frameworks. The 1/4"-20 UNC coarse thread configuration provides superior holding power in wood, metal, and composite materials, while the partial threading allows for precise gap closure and material compression control. The pan head profile offers an optimal balance between low-profile design and sufficient bearing surface, making these 6-inch screws ideal for applications requiring deep penetration and secure fastening. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures these fasteners withstand vibration, dynamic loads, and environmental challenges in commercial and industrial settings.

Specification Summary & Compliance

These rounded head screws feature precise Class 2A thread fit tolerances and comply with ASME B18.6.3 manufacturing specifications. The 1/4"-20 UNC coarse thread maintains industry-standard dimensions for compatibility with existing components and tooling. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various industrial sectors. The zinc-plated steel construction meets corrosion protection requirements while maintaining the mechanical properties specified in the ASME standard.