S-93516A578 5/16"-18 x 1/2" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance for long-lasting performance in marine and harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity in demanding applications
• Rockwell B70 hardness provides superior durability and resistance to deformation under stress
• Fully threaded UNC coarse thread design enables faster installation and superior grip in various materials
• External hex drive compatibility allows for standard tool usage and secure torque application
• Compliance with ASME B18.2.1 specifications guarantees dimensional accuracy and interchangeability
• RoHS 3 and REACH environmental compliance ensures safe usage in regulated industries

Professional Applications & Engineering Value

Engineered for marine applications and harsh environments, these 651 Silicon Bronze hex head screws provide critical corrosion resistance where standard fasteners fail. The UNC coarse thread design ensures rapid installation and superior holding power in wood, composite, and softer metals, while the Class 2A thread fit maintains precise tolerances for consistent performance. With 70,000 psi tensile strength and Rockwell B70 hardness, these fully threaded screws withstand vibration and stress in boat building, offshore structures, chemical processing equipment, and coastal construction projects where durability and environmental compliance are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 standards with Class 2A thread fit for dimensional accuracy. Features 5/16"-18 UNC coarse threads, 1/2" length, and external hex drive. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.