S-90357A021 1/4"-20 x 2" 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 for secure assemblies
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and durability in demanding industrial environments
- Ultra-low socket head profile enables installation in confined spaces while maintaining full hex drive functionality
- Rockwell C32 hardness rating delivers excellent wear resistance and long service life
- Coarse UNC threading allows for quicker installation and reduced cross-threading risks
- Tight length tolerance (±0.005") ensures consistent performance and precise assembly dimensions
Professional Applications & Engineering Value
These socket head cap screws with black-oxide alloy steel construction address critical engineering challenges in industrial applications where space constraints and corrosion resistance are paramount. The ultra-low profile socket head design enables installation in tight clearance applications while maintaining the strength advantages of hex drive functionality. The Class 3A thread fit with UNC coarse threads provides superior vibration resistance in machinery, automotive, and equipment manufacturing applications. The combination of 140,000 psi tensile strength and Rockwell C32 hardness ensures these fasteners withstand dynamic loads and repeated stress cycles without compromising integrity, making them ideal for critical assemblies requiring reliable, long-term performance.
Specification Summary & Compliance
This 1/4"-20 UNC socket head cap screw features precision Class 3A thread fit with tight dimensional control, including length tolerance of -0.005" to +0.005". Manufactured from high-strength alloy steel with black-oxide surface treatment, the fastener delivers consistent performance across industrial applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries and international markets.
