S-90117A235 5/16"-24 x 1" 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
- Superior corrosion resistance with black-oxide coating that protects against rust and extends service life in harsh environments.
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
- Precise Class 3A thread fit provides tight tolerances for secure, vibration-resistant fastening in critical assemblies.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Standard hex drive (1/4") allows for easy installation and removal with common tools, improving assembly efficiency.
- Fine UNF threads (5/16"-24) deliver enhanced grip and load distribution, ideal for fine-adjustment applications.
- Full compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening and corrosion in demanding environments. The fine UNF threads with Class 3A fit ensure minimal backlash and superior clamping force, making it ideal for precision machinery, automotive systems, and aerospace components where reliability is critical. The high tensile strength (170,000 psi) and Rockwell C37 hardness provide durability against dynamic loads and wear, reducing maintenance needs. Combined with a standard hex drive for easy access in confined spaces, this screw offers a robust fastening solution that enhances assembly integrity and longevity in industrial applications.
Specification Summary & Compliance
This socket head cap screw features a 5/16"-24 UNF fine thread with Class 3A fit, ensuring precise dimensional accuracy per ASME B18.3 standards. It is fully threaded with a right-hand direction and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for environmental safety. The specifications include a 1" length, 15/32" head diameter, and wire locking type for secure fastening in regulated industries.
