S-93516A638 3/8"-16 x 4" 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
- Superior corrosion resistance ideal for marine and harsh environments, extending service life and reducing replacement costs
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
- Fully threaded UNC coarse pattern with Class 2A fit enables quick installation and secure fastening in various materials
- External hex drive design allows for easy application of high torque with standard tools, improving assembly efficiency
- Compliance with ASME B18.2.1 guarantees dimensional accuracy and interchangeability for consistent quality
- RoHS 3 and REACH compliant for safe use in regulated industries and environmentally sensitive applications
Professional Applications & Engineering Value
These 651 Silicon Bronze hex head screws are engineered to solve critical challenges in demanding environments where corrosion and mechanical stress are prevalent. The silicon bronze material offers exceptional resistance to saltwater, chemicals, and atmospheric exposure, making these UNC coarse thread screws a top choice for marine construction, offshore platforms, and coastal infrastructure. The fully threaded 4" length and Class 2A thread fit ensure maximum grip and vibration resistance, reducing the risk of loosening in dynamic applications. With a 70,000 psi tensile strength and external hex drive, they provide reliable fastening in heavy-duty assemblies, from shipbuilding to industrial equipment, ensuring long-term structural integrity and minimal maintenance.
Specification Summary & Compliance
This screw features a 3/8"-16 UNC coarse thread with Class 2A thread fit for precise dimensional tolerance, ensuring easy assembly and consistent performance. It is manufactured in compliance with ASME B18.2.1 standards for hex head screws, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally regulated and safety-critical applications.
