S-90275A330 1/2"-13 x 3/4" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
• Exceptional holding power from 60,000 psi tensile strength and Rockwell B70 hardness, preventing stripping and failure under heavy loads
• Precise Class 2A thread fit for smooth installation and secure fastening without cross-threading in UNC coarse thread applications
• Optimal flush mounting with standard 82° countersink angle and flat head design, creating seamless surfaces in assembled components
• Enhanced installation efficiency through fully threaded design and slotted drive, allowing quick assembly with standard tools
• Reliable compliance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3 & REACH), ensuring quality and regulatory acceptance
• Versatile coarse threading (1/2"-13 UNC) providing excellent engagement in various materials and resistance to vibration loosening

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this zinc-plated steel flat head screw delivers critical performance where corrosion resistance and structural integrity are paramount. The UNC coarse threading with Class 2A fit ensures reliable engagement in metal, wood, and composite materials, while the 82° countersink angle provides flush mounting for aerodynamic and safety-critical surfaces. With full threading along the 3/4" length, it maximizes thread contact in thin materials and prevents joint separation under vibration. The slotted drive accommodates standard installation tools, making it ideal for maintenance, machinery assembly, and structural frameworks where 60,000 psi tensile strength withstands dynamic loads without deformation.

Specification Summary & Compliance

This flat head screw maintains precise Class 2A thread fit per UNC standards with 1/2"-13 coarse threading and right-hand direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial use.