S-90357A019 1/4"-20 x 1 3/4" 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 demanding applications
- Precision Class 3A thread fit provides superior engagement and vibration resistance
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and durability
- Ultra-low socket head profile enables installation in confined spaces with 1/8" hex drive compatibility
- Rockwell C32 hardness maintains thread integrity and prevents stripping under high torque
- Tight length tolerance control (±0.005") ensures consistent installation and assembly precision
- Full threading along 1 3/4" length allows for maximum adjustability and secure fastening depth
Professional Applications & Engineering Value
These 1/4"-20 UNC socket head cap screws with Class 3A precision threads are engineered to solve critical fastening challenges in industrial machinery, automation systems, and precision equipment. The black-oxide alloy steel construction combined with 140,000 psi tensile strength provides exceptional resistance to shock loads and vibrational loosening. The ultra-low profile socket head design is particularly valuable in space-constrained applications where standard fasteners cannot be accommodated. The coarse UNC thread form ensures quick installation and reliable performance in high-vibration environments, while the fully threaded design offers maximum flexibility in adjustment and clamping force distribution across the entire 1 3/4" length.
Specification Summary & Compliance
These precision socket head cap screws feature 1/4"-20 UNC coarse threads with Class 3A thread fit per ASME B1.1 standards, ensuring tight tolerances and reliable performance. The manufacturing process maintains strict length tolerance control from -0.005" to +0.005" for consistent assembly results. These fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for use in various industrial sectors requiring adherence to strict material and safety standards.
