S-90299A545 1/4"-20 x 1 1/2" ASME B18.3, ASTM A574 Brass-Tip Alloy Steel Socket Head Screws
Brass-Tip Alloy Steel Socket 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 from the black-oxide finish on alloy steel, extending service life in demanding environments.
- Exceptional tensile strength (180,000 psi) and hardness (Rockwell C39) for reliable performance in high-stress, heavy-duty applications. li>Precise Class 3A thread fit ensures secure, vibration-resistant fastening and superior assembly accuracy.
- Non-marring brass tip protects sensitive surfaces from scratches and damage during installation and use.
- Hex socket drive allows for high-torque installation and removal in confined spaces with standard tools.
- Compliance with major standards (ASME B18.3, ASTM A574) guarantees consistent quality and interchangeability.
- RoHS 3 and REACH compliance ensures the screw meets stringent environmental and safety regulations for global use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to solve critical fastening challenges in industrial settings. Its 1/4"-20 UNC coarse thread and Class 3A fit provide excellent grip and resistance to loosening under vibration, making it ideal for machinery, automotive assemblies, and precision equipment. The partially threaded design offers controlled clamping force, while the non-marring brass tip is essential for applications involving delicate materials like aluminum or finished surfaces, preventing costly damage. Combined with a hex drive for easy access in tight spaces, this screw delivers reliable, heavy-duty performance where durability and surface protection are paramount.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with a Class 3A fit for high precision. It is manufactured in accordance with ASME B18.3 and ASTM A574 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and health safety standards.
