S-90272A401 1/4"-20 x 3 3/4" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Easy installation and removal with No. 3 Phillips drive and standard pan head design for efficient assembly operations
• Optimal thread engagement with fully threaded UNC coarse pattern and Class 2A fit for secure fastening in various materials
• Enhanced durability with right-hand threading and 3-3/4" length providing versatile application capabilities
• Regulatory compliance assurance meeting ASME B18.6.3 standards for consistent quality and performance
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

This zinc-plated steel Phillips pan head screw delivers exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical strength are critical. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in structural assemblies, machinery frames, and heavy equipment where vibration resistance is essential. The UNC coarse threading with Class 2A fit provides superior grip in various materials, reducing the risk of stripping while the fully threaded design maximizes holding power across the entire 3-3/4" length. The zinc plating offers effective protection against environmental factors, making these rounded head screws ideal for outdoor equipment, manufacturing facilities, and automotive applications where durability and regulatory compliance are paramount.

Specification Summary & Compliance

This heavy-duty fastener features precise Class 2A thread fit with UNC coarse threading (1/4"-20) and meets rigorous manufacturing specifications per ASME B18.6.3 standards. The screw maintains dimensional accuracy with 0.25" thread diameter and 0.492" head diameter for consistent performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety standards are fully met.