S-90121A587 5/16"-18 x 1 1/2" ASME B18.2.1 Stainless Steel Wire-Lockable Hex Head Screws
Stainless Steel Wire-Lockable 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 with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
- High tensile strength of 70,000 psi ensures dependable performance under significant load and stress.
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation.
- External hex drive and hex head design allows for easy installation and high torque application with standard tools.
- Class 2A thread fit and UNC coarse threading enable quick assembly and reliable fastening in various materials.
- Partially threaded shank offers optimal grip and clamping force for specific joint requirements.
- Compliance with ASME B18.2.1 and RoHS 3 guarantees consistent quality, safety, and environmental standards.
Professional Applications & Engineering Value
This 5/16"-18 UNC hex head screw is engineered to address critical challenges in industrial settings, such as vibration loosening and material fatigue. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for outdoor, marine, and chemical processing applications where moisture and corrosive agents are present. Its partially threaded design and coarse UNC thread ensure secure fastening in metals, plastics, and composites, reducing the risk of strip-out and improving assembly efficiency. With a tensile strength of 70,000 psi and Rockwell B70 hardness, it delivers reliable performance in heavy-duty machinery, construction frameworks, and automotive assemblies, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 2A fit for precise dimensional accuracy, a length of 1-1/2", and a partially threaded shank with a minimum thread length of 7/8". It is manufactured in accordance with ASME B18.2.1 specifications and is RoHS 3 (2015/863/EU) compliant, ensuring adherence to industry standards for safety and environmental responsibility.
