S-90117A117 4-40 x 3/8" 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.
- Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh environments, minimizing maintenance needs.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
- Hex socket drive design allows for easy installation and removal with standard tools, improving efficiency in tight spaces.
- Wire locking feature provides added security against unintentional disassembly, ideal for dynamic or vibrating machinery.
- Compliance with ASME B18.3 standards ensures consistent quality and interchangeability, streamlining procurement and inventory management.
- RoHS 3 and REACH compliance supports environmental and safety regulations, making it suitable for global supply chains.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw with a 4-40 UNC coarse thread and Class 3A fit is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The right-hand threading and wire locking mechanism provide secure fastening in machinery, automotive, and aerospace assemblies, where reliability is critical. Its Rockwell C37 hardness and high tensile strength ensure durability under heavy loads, reducing downtime and replacement costs. Ideal for applications requiring inch system components, this screw offers consistent performance in equipment manufacturing, ensuring long-term operational stability and compliance with industry standards.
Specification Summary & Compliance
This product features a Class 3A thread fit with 4-40 UNC coarse threads and precise dimensions, including a 3/8" length and 3/32" hex drive. It meets ASME B18.3 specifications for socket head cap screws, ensuring dimensional accuracy and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible use in various industrial sectors.
