S-90279A291 12-24 x 1/2" ASME B18.6.3 Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical stress
• Class 2A thread fit provides smooth assembly and consistent engagement for production efficiency
• Rockwell B69 hardness rating delivers excellent durability and resistance to wear during installation
• Phillips No. 3 drive design enables secure tool engagement and reduces cam-out risks
• Coarse UNC threading offers quick installation and superior holding power in various materials
• Full threading along the entire 1/2" length maximizes grip strength and fastening versatility

Professional Applications & Engineering Value

These 12-24 UNC zinc-plated steel screws are engineered to address critical industrial fastening challenges where corrosion resistance and high tensile strength are paramount. The rounded head design with Phillips drive provides optimal surface contact while preventing damage to assembled components. The coarse thread configuration ensures rapid installation in metal, plastic, and composite materials commonly found in manufacturing equipment, electrical enclosures, and machinery assemblies. With their 60,000 psi tensile strength and Rockwell B69 hardness, these screws maintain structural integrity under vibration and dynamic loads, making them ideal for production lines, industrial maintenance, and OEM applications requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision assembly. Features 12-24 UNC coarse threads with right-hand orientation and full threading along the 1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.