S-90357A141 1/4"-20 x 1 3/16" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile 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 140,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in demanding environments.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for long-term use.
- Ultra-low socket head profile allows installation in tight spaces where clearance is limited, increasing design flexibility.
- Rockwell C32 hardness delivers excellent wear resistance and maintains thread integrity under repeated assembly.
- 1/8" hex drive compatibility enables secure tool engagement for efficient installation and removal with standard tools.
- Full threading along the 1-3/16" length ensures consistent clamping force and versatility across various material thicknesses.
Professional Applications & Engineering Value
These 1/4"-20 UNC Socket Head Cap Screws are engineered to address critical challenges in industrial assembly, such as maintaining joint integrity under dynamic loads and corrosive conditions. The black-oxide alloy steel construction combines high tensile strength with corrosion protection, making them ideal for machinery, automotive, and aerospace applications where reliability is paramount. The Class 3A thread fit and coarse UNC thread design ensure quick assembly and superior resistance to vibration loosening, reducing maintenance needs. Their ultra-low profile head and fully threaded body provide consistent performance in confined spaces, offering engineers a dependable solution for precision fastening requirements.
Specification Summary & Compliance
This product adheres to Class 3A thread fit tolerances for precise engagement, with a length tolerance of -0.005" to 0.005" ensuring dimensional accuracy. Manufactured to UNC coarse thread standards with a right-hand thread direction, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial use.
