S-93516A202 1/2"-20 x 3" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 651 Silicon Bronze material, ideal for harsh marine and chemical environments
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B70 hardness provides superior durability and resistance to wear and deformation
• Precision Class 2A thread fit guarantees smooth installation and secure fastening in industrial assemblies
• Fully threaded UNF fine pitch design offers maximum grip and uniform stress distribution
• External hex drive with 3/4" head width allows for easy installation with standard tools
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures quality, safety, and environmental standards

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 1/2"-20 UNF silicon bronze hex head screws deliver outstanding performance in marine, chemical processing, and offshore applications where corrosion resistance is critical. The 651 Silicon Bronze material provides natural immunity to saltwater corrosion and stress corrosion cracking, while the fine thread pitch and Class 2A thread fit ensure precise engagement and vibration resistance in machinery and structural assemblies. The external hex drive design facilitates quick installation and removal with standard wrenches, making them ideal for maintenance-intensive applications. With 70,000 psi tensile strength and Rockwell B70 hardness, these screws maintain integrity under extreme conditions, reducing replacement frequency and downtime.

Specification Summary & Compliance

This 3" hex head screw features 1/2"-20 UNF fine threads with Class 2A thread fit tolerance for precision assembly. Manufactured to ASME B18.2.1 specifications, the screw is fully threaded with right-hand orientation and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety and restricted substances.