S-90273A190 8-32 x 1/4" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Optimal flush mounting with undercut flat head and 82° countersink angle for seamless surface integration
• High-torque installation capability through Phillips No. 2 drive design that prevents cam-out during assembly
• Reliable thread engagement with coarse UNC threads and Class 2A fit ensuring consistent fastening performance
• Exceptional mechanical strength delivering 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Full-thread coverage along the 1/4" length providing maximum grip and load distribution
• Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance

Professional Applications & Engineering Value

These 8-32 UNC flat head screws deliver critical engineering solutions where surface flushness and corrosion resistance are paramount. The zinc-plated steel construction provides essential protection against environmental degradation in manufacturing facilities, electrical enclosures, and machinery assemblies. The undercut flat head profile with 82° countersink angle ensures perfect seating in precision-machined components, eliminating protrusions that could interfere with moving parts or create safety hazards. With coarse thread design and Class 2A thread fit, these screws offer rapid installation in production environments while maintaining vibration resistance in high-stress applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes them ideal for securing critical components in automotive, aerospace, and industrial equipment where failure is not an option.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards for dimensional precision, these screws feature Class 2A thread fit tolerances ensuring consistent mating with standard nuts and threaded holes. The UNC coarse thread profile (8-32 size) provides optimal performance in most materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and regulatory acceptance for global industrial applications.