S-90275A576 1/4"-20 x 6" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness to withstand high-stress applications
• Reliable coarse threading with UNC pattern and Class 2A fit ensures secure fastening and vibration resistance
• Optimized flush mounting with standard 82° countersink angle for seamless surface integration and improved aesthetics
• Enhanced installation control through slotted drive design allowing precise torque application
• Partial threading design provides superior clamping force distribution across the 6" length
• Regulatory compliance assurance meeting major industrial standards for quality and environmental safety

Professional Applications & Engineering Value

These zinc-plated steel flat head screws deliver critical performance advantages for industrial assembly applications where flush surface mounting and corrosion resistance are paramount. The 1/4"-20 UNC coarse thread configuration provides excellent engagement in various materials while resisting vibration-induced loosening. The 82° countersink angle ensures proper seating in standard chamfered holes, preventing protrusion issues in machinery, equipment frames, and structural components. With partial threading along the 6" length, these fasteners optimize clamping force distribution, making them ideal for securing thick materials and assemblies in manufacturing, construction, and heavy equipment applications where reliability under stress is non-negotiable.

Specification Summary & Compliance

This flat head screw features precise Class 2A thread fit tolerances with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring suitability for global industrial markets and environmentally conscious operations.