S-93516A554 1/4"-20 x 3" ASME B18.2.1 Bronze Hex Head Screws
Bronze Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance from 651 Silicon Bronze material, ideal for marine and harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B70 hardness provides superior durability and wear resistance for long service life
- Fully threaded UNC coarse pattern delivers faster installation and stronger holding power in soft materials
- External hex drive design allows for high-torque application with standard tools
- Class 2A thread fit guarantees consistent quality and easy assembly in manufacturing
- Comprehensive regulatory compliance including ASME B18.2.1, RoHS 3 and REACH for quality assurance
Professional Applications & Engineering Value
These 651 Silicon Bronze hex head screws deliver critical performance advantages in demanding applications where corrosion resistance and mechanical strength are paramount. The silicon bronze composition provides exceptional protection against saltwater corrosion and chemical exposure, making these UNC threaded fasteners ideal for marine hardware, offshore platforms, and coastal infrastructure. The coarse thread pattern ensures superior grip in wood, soft metals, and composite materials, while the external hex drive accommodates high installation torque without stripping. Engineers specify these screws for permanent installations in harsh environments where failure is not an option, providing reliable corrosion resistant performance that outperforms standard steel fasteners.
Specification Summary & Compliance
This 1/4"-20 x 3" hex head screw features Class 2A thread fit tolerance per UNC standards, ensuring consistent quality and interchangeability. Manufacturing complies with ASME B18.2.1 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, providing environmental responsibility alongside technical performance.
