S-90273A249 10-24 x 1 1/4" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical loads and vibrations
• Class 2A thread fit provides smooth assembly and consistent engagement while maintaining dimensional accuracy
• 82° countersink angle with standard flat head profile enables flush mounting for clean, professional finishes
• Phillips No. 2 drive design offers secure tool engagement and efficient installation with common drivers
• Full threading along the 1-1/4" length maximizes grip strength and distribution across the entire fastener
• Rockwell B70 hardness rating maintains structural integrity and resists deformation during installation

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver exceptional engineering value through their zinc-plated steel composition and coarse thread design, specifically addressing common industrial fastening challenges. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in high-stress applications where vibration resistance and load-bearing capacity are critical. The 82° countersink angle and standard flat head profile provide seamless integration into machinery, electrical enclosures, and structural assemblies, eliminating protrusions that could interfere with operation. The fully threaded configuration maximizes surface contact for superior holding power in metal-to-metal and composite material applications, making these Phillips drive screws ideal for manufacturing, automotive, and equipment maintenance where consistent, secure fastening is paramount.

Specification Summary & Compliance

These flat head screws feature precision 10-24 UNC coarse threads with Class 2A thread fit tolerances ensuring consistent mating with standard nuts and threaded components. Manufactured in compliance with ASME B18.6.3 specifications for dimensional accuracy and performance standards. The products are fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, meeting the latest environmental and regulatory requirements for industrial applications.