S-90124A311 1/4"-20 x 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 strength and durability with Grade 5 classification, providing 120,000 psi tensile strength for reliable performance in demanding applications.
- Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh industrial environments.
- Optimized for high-torque assembly thanks to the external hex drive and hex head design, ensuring secure installation with standard tools.
- Secure and stable fastening achieved through UNC coarse threading and Class 2A fit, reducing the risk of cross-threading and loosening under vibration.
- Full thread engagement along the entire 1/2" length, offering maximum grip and load distribution in various material thicknesses.
- Compliance with industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 compliance, meeting global regulatory requirements for hazardous substances.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 Black-Oxide Steel Hex Head Screws address critical challenges in machinery, construction, and automotive assemblies. The UNC coarse thread and Class 2A fit provide rapid installation and high resistance to vibrational loosening, while the external hex drive allows for efficient torque application. With a Rockwell C25 hardness and 120,000 psi tensile strength, they withstand extreme loads and stresses. The black-oxide coating enhances corrosion resistance, making them ideal for outdoor or humid conditions. Fully threaded for versatile grip, these screws are a reliable choice for structural fastening where durability and compliance with ASME B18.2.1 standards are paramount.
Specification Summary & Compliance
This screw features precise UNC 1/4"-20 coarse threading with a Class 2A fit for standard tolerance and easy assembly. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring consistent dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant, adhering to environmental regulations for restricted substances.
