S-90273A294 12-24 x 3/4" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for reliable performance in demanding industrial environments.
• Superior tensile strength rated at 60,000 psi ensures secure, long-lasting fastening under high-stress conditions.
• Consistent flush installation with a standard 82° countersink angle and flat head design for smooth, unobtrusive surfaces.
• Efficient drive engagement using a No. 3 Phillips drive for quick, stable installation with common tools.
• Reliable thread performance with Class 2A coarse UNC threads providing excellent grip and vibration resistance.
• Full-threaded design maximizes holding power along the entire 3/4" length for uniform load distribution.
• Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for assured quality and environmental safety.

Professional Applications & Engineering Value

This 12-24 UNC flat head screw is engineered to address critical fastening challenges in industrial assembly, machinery, and metal fabrication. The zinc-plated steel material provides a durable barrier against rust and corrosion, extending service life in humid or outdoor settings. Its coarse thread spacing and Class 2A thread fit ensure rapid installation and strong retention, even in materials prone to stripping. The flat head with standard profile and 82° countersink angle allows for seamless integration into countersunk holes, preventing protrusions that could interfere with moving parts or safety. With a Rockwell B70 hardness and 60,000 psi tensile strength, it withstands dynamic loads and vibrations, making it ideal for automotive, electrical enclosures, and structural applications where reliability is non-negotiable.

Specification Summary & Compliance

This screw adheres to ASME B18.6.3 specifications for dimensional accuracy and performance. Threads conform to UNC coarse spacing with a Class 2A fit for consistent engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use. The product meets all stated measurements, including a 3/4" length, No. 3 Phillips drive, and 0.412" head diameter, guaranteeing interchangeability and reliability in professional applications.