S-93516A546 1/4"-20 x 1 1/2" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in marine and harsh industrial environments
• High tensile strength of 70,000 PSI ensures reliable performance under demanding mechanical loads
• Rockwell B70 hardness provides excellent durability and wear resistance
• Class 2A thread fit guarantees consistent, reliable fastening with standard mating components
• Fully threaded UNC coarse design enables faster installation and superior holding power
• External hex drive allows for high-torque application with standard tools
• Compliant with multiple industry standards including ASME B18.2.1, RoHS 3, and REACH

Professional Applications & Engineering Value

Engineered for demanding environments where corrosion resistance and structural integrity are paramount, these silicon bronze hex head screws deliver exceptional performance in marine applications, chemical processing facilities, and coastal infrastructure. The 651 silicon bronze material provides natural resistance to saltwater corrosion and atmospheric degradation, while the 1/4"-20 UNC coarse thread design ensures rapid installation and reliable clamping force. The external hex drive configuration accommodates high-torque applications, making these fully threaded screws ideal for critical assemblies requiring consistent fastening pressure along the entire shank length. With their 70,000 PSI tensile strength and Rockwell B70 hardness, these fasteners maintain structural stability in vibration-prone applications, offering engineers a reliable solution for permanent installations in corrosive environments.

Specification Summary & Compliance

These hex head screws feature precision Class 2A thread fit tolerances with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.2.1 specifications for dimensional accuracy and performance standards. The fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial applications. With dimensions of 1 1/2" length, 7/16" head width, and 5/32" head height, these screws maintain consistent quality for reliable industrial fastening solutions.