S-92220A209 1/4"-28 x 5/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel 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
- Superior thread precision with Class 3A fit ensures reliable, vibration-resistant connections in demanding applications.
- Exceptional tensile strength of 140,000 psi provides high load-bearing capacity and resistance to mechanical failure.
- Enhanced corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments.
- Low-profile socket head design allows installation in tight spaces while maintaining a sleek, flush appearance.
- Fine UNF threads offer improved clamping force and better adjustment accuracy compared to coarse threads.
- Consistent hardness (Rockwell C39) ensures durability and wear resistance through repeated assembly cycles.
- Full compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
This low profile socket head cap screw is engineered for precision assemblies where space constraints and high-strength requirements coexist. The black-oxide alloy steel construction provides a durable, corrosion-resistant solution that withstands exposure to oils, moisture, and industrial chemicals. With Class 3A fine UNF threads, it delivers superior thread engagement and clamping force, reducing the risk of loosening under dynamic loads. Ideal for machinery, automotive, and aerospace components, the 1/8" hex drive and low-profile head enable easy installation in confined areas without compromising on 140,000 psi tensile strength. These screws are trusted in applications demanding repeatable performance, from precision instruments to heavy-duty equipment, ensuring long-term reliability and reduced maintenance.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision and consistent engagement. It is fully threaded and right-hand oriented, with a low-profile socket head measuring 3/8" in diameter and 1/8" in height. Manufactured to meet ASTM A574 specifications, it also complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for industrial use.
