S-90280A540 1/4"-20 x 3/4" ASME B18.6.3 Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for reliable performance in demanding industrial environments
• Superior holding power with 60,000 psi tensile strength and Rockwell B69 hardness for secure fastening in high-stress applications
• Easy installation and removal through the deep slotted drive and fillister head design that provides excellent tool engagement
• Reliable thread engagement with UNC coarse spacing and Class 2A thread fit ensuring consistent performance and reduced cross-threading risk
• Full-length threading offers maximum grip along the entire 3/4" length for enhanced fastening security
• Compliance assurance with ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
• Versatile rounded head profile combines high, narrow fillister design with right-hand threading for broad industrial compatibility

Professional Applications & Engineering Value

These zinc-plated steel fillister head slotted screws deliver exceptional engineering value across multiple industrial sectors. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in mechanical assemblies, electrical enclosures, and machinery where vibration resistance is critical. The high, narrow fillister head design provides superior clearance in counterbored applications while the deep slotted drive accommodates standard screwdrivers for efficient installation. With UNC coarse threading and Class 2A thread fit, these screws offer quick assembly and disassembly in maintenance operations, reducing downtime in manufacturing and repair environments. The zinc plating extends service life by protecting against corrosion in humid or outdoor conditions, making these fully threaded screws ideal for automotive, industrial equipment, and construction applications where durability and regulatory compliance are paramount.

Specification Summary & Compliance

This 1/4"-20 x 3/4" fillister head slotted screw features precise Class 2A thread fit with UNC coarse spacing (20 threads per inch) and full threading along the entire length. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The zinc-plated steel construction meets rigorous industrial standards for corrosion resistance and mechanical performance.