S-90117A200 1/4"-28 x 3/4" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws
Alloy Steel Wire-Lockable 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
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Class 3A thread fit provides superior precision and tight tolerances for secure, vibration-resistant assemblies in machinery and equipment.
- Black-oxide coating on alloy steel enhances corrosion resistance and durability, extending service life in harsh operating environments.
- Fine UNF threading offers improved load distribution and better sealing capabilities compared to coarse threads, ideal for precision engineering.
- Hex socket drive design allows for easy installation and removal with standard tools, minimizing assembly time and labor costs.
- Full threading along the 3/4" length ensures consistent grip and flexibility in various mounting scenarios, from automotive to aerospace.
- Compliance with ASME B18.3 and environmental standards guarantees quality, safety, and regulatory adherence for global supply chain integration.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this black-oxide alloy steel socket head cap screw addresses critical challenges like vibration loosening and material fatigue. The fine UNF thread (1/4"-28) and Class 3A fit deliver precise engagement, reducing the need for frequent maintenance in machinery, automotive systems, and precision instruments. With a Rockwell C37 hardness and robust 170,000 psi tensile strength, it withstands extreme loads and environmental stressors, while the hex drive simplifies installation in confined spaces. Ideal for assembly lines and heavy-duty equipment, this fastener ensures long-term reliability and compliance with industry benchmarks like ASME B18.3.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-28 UNF fine thread with Class 3A tolerance for exacting dimensional accuracy, alongside a 3/16" hex drive and fully threaded 3/4" length. Manufactured in accordance with ASME B18.3 specifications, it is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations for industrial use.
