S-90124A321 5/16"-18 x 1 1/2" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws
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
- Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide steel finish extends service life and maintains integrity in harsh industrial environments.
- High hardness rating (Rockwell C25) provides excellent wear resistance, minimizing damage during installation and use.
- Coarse UNC threading allows for faster assembly and better performance in materials where fine threads may strip or fail.
- Secure external hex drive offers easy installation with standard tools, improving efficiency and reducing assembly time.
- Partial threading design provides optimal clamping force and vibration resistance, ideal for dynamic load conditions.
- Compliance with industry standards (ASME B18.2.1, SAE J429) guarantees consistent quality and interchangeability.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 black-oxide steel hex head screws deliver outstanding performance where reliability is critical. The partially threaded UNC coarse thread design ensures superior grip and resistance to loosening under vibration, making them ideal for machinery, construction, and automotive assemblies. The black-oxide coating provides a durable barrier against corrosion, significantly extending the fastener's lifespan in challenging environments. With a high tensile strength of 120,000 psi and precise Class 2A thread fit, these screws offer consistent clamping force and ease of installation, reducing maintenance needs and enhancing operational safety in industrial fastening systems.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and reliable engagement. Manufactured to meet ASME B18.2.1 and SAE J429 specifications, ensuring consistent performance and interchangeability. Compliant with RoHS 3 (2015/863/EU) regulations, supporting environmental and safety standards in global supply chains.
