S-91440A560 1/4"-20 x 6" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional load-bearing capacity with 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Reliable installation flexibility through dual Phillips/Slotted drive system accommodating multiple tool types
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening in various materials
• Full-length threading providing maximum grip strength across the entire 6-inch shank length
• Standard-compliant performance meeting ASME B18.6.3 specifications for dimensional accuracy and mechanical properties
• Environmental regulation compliance with RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

This 1/4"-20 zinc-plated steel rounded head screw delivers critical engineering solutions for industrial assembly challenges. The zinc-plated steel construction provides essential corrosion protection in manufacturing facilities, outdoor equipment, and mechanical systems where environmental exposure is a concern. The UNC coarse threading and Class 2A thread fit ensure rapid installation and reliable performance in wood, metal, and composite materials, reducing assembly time while maintaining joint integrity. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes these fully threaded screws ideal for structural applications requiring sustained clamping force. The dual Phillips/Slotted drive system offers installation versatility for maintenance crews and production lines alike, while the 6-inch length provides ample engagement for thick material sections commonly encountered in heavy equipment and construction applications.

Specification Summary & Compliance

This rounded head screw features precise Class 2A thread fit tolerance according to UNC coarse thread standards with 1/4"-20 threading and full 6-inch length. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial applications.