S-90117A569 1/4"-20 x 2 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
- Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
- Exceptional load-bearing capability with 170,000 PSI tensile strength to withstand high-stress applications
- Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening
- Optimized torque transmission through 3/16" hex drive for secure installation without stripping
- Enhanced durability with Rockwell C37 hardness maintaining structural integrity under repeated use
- Versatile partial threading allowing both clamping and alignment functions in assembly operations
- Wire locking compatibility providing additional security against loosening in critical applications
Professional Applications & Engineering Value
Engineered for high-performance industrial fastening, these black-oxide alloy steel socket head cap screws address critical challenges in machinery assembly, automotive manufacturing, and heavy equipment applications. The 1/4"-20 UNC coarse thread configuration ensures rapid installation while maintaining Class 3A precision for consistent clamping force. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness provides exceptional resistance to dynamic loads and vibration fatigue, making these socket head screws ideal for applications where reliability is paramount. The black-oxide surface treatment offers superior corrosion protection without compromising dimensional accuracy, while the hex drive design enables high-torque installation in confined spaces.
Specification Summary & Compliance
This socket head cap screw features 1/4"-20 UNC coarse threads with Class 3A thread fit precision, manufactured to ASME B18.3 specifications for dimensional consistency. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards, ensuring regulatory adherence for global industrial applications. With a minimum thread length of 1" and overall length of 2 3/4", the partially threaded design maintains strict manufacturing tolerances throughout.
