S-90124A312 1/4"-20 x 5/8" 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
- Superior corrosion resistance with black-oxide steel finish, extending service life in demanding environments
- High-strength performance with Grade 5 classification and 120,000 psi tensile strength for reliable heavy-duty applications
- Exceptional wear resistance thanks to Rockwell C25 hardness, maintaining integrity under repeated stress
- Secure and precise fastening with Class 2A thread fit and UNC coarse threads, reducing cross-threading risks
- Easy installation and removal with external hex drive and 7/16" head width, compatible with standard tools
- Full thread engagement along the 5/8" length, providing maximum grip and vibration resistance
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards and RoHS 3 environmental regulations
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 hex head screws deliver exceptional performance where reliability is critical. The black-oxide steel construction provides superior corrosion resistance, making them ideal for machinery, equipment assembly, and structural frameworks exposed to harsh conditions. The UNC coarse threads with Class 2A fit ensure quick installation and secure fastening, while the fully threaded design maximizes contact surface for enhanced load distribution. With 120,000 psi tensile strength and Rockwell C25 hardness, these screws maintain integrity under extreme vibration and stress, preventing premature failure in automotive, construction, and manufacturing applications where high-strength fasteners are essential for operational safety and longevity.
Specification Summary & Compliance
This 1/4"-20 x 5/8" hex head screw features precise Class 2A thread fit with UNC coarse threads and right-hand threading direction. Manufactured to ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance consistency. The fastener is fully compliant with RoHS 3 (2015/863/EU) environmental regulations, containing no restricted hazardous substances. With Grade 5 strength classification, 120,000 psi tensile strength, and Rockwell C25 hardness, this screw meets rigorous industrial standards for quality and reliability.
