S-99468A161 1/4"-20 x 3/4" ASME B18.6.3 Aluminum Slotted Flat Head Screws

Key Features & Benefits at a Glance

• High strength-to-weight ratio from 2024 aluminum construction, providing durable fastening without adding excessive weight to assemblies
• Superior tensile strength rated at 50,000 psi ensures reliable performance under significant mechanical stress
• Precision UNC coarse threading with Class 2A fit enables quick installation and secure holding in various materials
• Optimized 82° countersink angle creates a flush surface finish for streamlined applications requiring smooth profiles
• Full threading along the 3/4" length maximizes grip and distribution of clamping force across the entire fastener
• Rockwell B55 hardness provides excellent resistance to wear and deformation in demanding environments
• Compliance with major industrial standards including ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental responsibility

Professional Applications & Engineering Value

This 2024 aluminum flat head screw with 1/4"-20 UNC coarse threading delivers exceptional value in applications where weight reduction, corrosion resistance, and structural integrity are critical. The combination of 50,000 psi tensile strength and Rockwell B55 hardness makes it ideal for aerospace components, electronic enclosures, and precision machinery where vibration resistance and durability are paramount. The fully threaded design ensures maximum engagement in tapped holes or with nuts, while the 82° countersink angle provides a clean, flush finish that eliminates protrusions in assembled products. The slotted drive style offers compatibility with standard installation tools, making these industrial fasteners versatile for maintenance and production lines alike.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerance per UNC standards, ensuring consistent performance across applications. Manufacturing follows ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious industrial operations and global markets.