S-90272A397 1/4"-20 x 1 1/8" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B70 hardness provides excellent wear resistance and prevents thread deformation
• Class 2A thread fit offers optimal assembly efficiency while maintaining secure fastening
• Fully threaded UNC coarse design enables faster installation and superior grip in various materials
• Phillips No. 3 drive system delivers efficient torque transfer and reduces cam-out risks
• Comprehensive regulatory compliance including ASME B18.6.3, RoHS 3, and REACH for global industrial applications

Professional Applications & Engineering Value

Engineered for industrial machinery, equipment assembly, and structural applications, these zinc-plated steel rounded head screws address critical fastening challenges. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in high-stress environments where vibration resistance is paramount. The fully threaded UNC coarse pattern provides maximum engagement in both metal and composite materials, while the pan head profile with Phillips drive offers flush mounting and efficient installation. These 1/4"-20 screws are particularly valuable in applications requiring repeated disassembly and reassembly, maintaining thread integrity through multiple cycles. The zinc plating delivers essential corrosion protection for manufacturing facilities, outdoor equipment, and industrial environments where moisture and chemicals are present.

Specification Summary & Compliance

This 1/4"-20 zinc-plated steel rounded head Phillips screw features Class 2A thread fit per UNC standards with coarse threading for optimal performance. Manufacturing complies with ASME B18.6.3 specifications ensuring dimensional accuracy and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. With right-hand thread direction and fully threaded design, these screws deliver consistent performance across industrial applications requiring reliable, high-strength fastening solutions.