S-90117A546 1/4"-20 x 1 1/2" 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 the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in demanding industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
- Partially threaded design allows for controlled clamping force and easier alignment in applications requiring specific grip lengths.
- Hex socket drive (3/16") enables high-torque installation with standard tools, facilitating efficient assembly and maintenance.
- Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability, ensuring consistent quality in OEM and MRO uses.
- RoHS 3 and REACH compliance supports environmental and safety regulations, making it suitable for global supply chains.
Professional Applications & Engineering Value
This 1/4"-20 UNC Socket Head Cap Screw is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in harsh settings. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, delivers outstanding durability and wear resistance, ideal for machinery, automotive, and aerospace assemblies. Its coarse thread (UNC) and partially threaded rod design facilitate quick installation and reliable grip in materials where fine threads might strip. The hex drive allows for compact access in confined spaces, enhancing versatility in industrial screw applications while maintaining high tensile strength for critical connections.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a 1/4"-20 UNC coarse thread with right-hand direction. It meets ASME B18.3 specifications for socket head cap screws, ensuring consistent performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and health safety in industrial fastener applications.
