S-90117A111 2-56 x 3/16" 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 under high-stress conditions, reducing failure risks in demanding applications.
- Corrosion-resistant black-oxide finish on alloy steel enhances durability and provides protection in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal backlash for consistent assembly quality.
- 5/64" hex drive design allows for easy installation and removal with standard tools, improving maintenance efficiency.
- Fully threaded body offers uniform clamping force along the entire length, ideal for applications requiring full engagement.
- Compliance with ASME B18.3 ensures dimensional accuracy and interoperability, meeting rigorous industry standards.
- RoHS 3 and REACH compliance supports environmental safety and regulatory requirements for global supply chains.
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 machinery, electronics, and automotive assemblies. The 2-56 UNC coarse thread with Class 3A fit provides superior resistance to dynamic loads, while the right-hand thread direction and wire locking type enhance stability in high-vibration environments. Its fully threaded design ensures even stress distribution, making it ideal for compact spaces where maximum grip is essential. With a Rockwell C37 hardness and robust construction, it delivers long-term reliability in industrial socket screw applications, reducing maintenance downtime and improving operational safety.
Specification Summary & Compliance
This screw adheres to ASME B18.3 specifications, ensuring precise dimensions including a thread diameter of 0.086", length of 3/16", and Class 3A thread fit for accurate assembly. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances. Manufactured with coarse thread spacing and UNC thread type in the inch system, it supports consistent performance across regulated industrial uses.
