S-90046A102 4-40 x 1/2" NAS1801-04-8 High-Strength Steel Hex Head Screws with Phillips Drive
High-Strength Steel Hex Head Screws with Phillips Drive
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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 160,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from cadmium plating extends service life in harsh or outdoor environments, minimizing maintenance needs.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and safety.
- High hardness (Rockwell C34) provides excellent wear resistance, maintaining thread integrity through repeated use.
- External hex/Phillips drive offers versatile installation options with standard tools, speeding up assembly and reducing labor time.
- Compliance with NAS1801-04-8 and RoHS 3/REACH ensures adherence to strict aerospace and environmental standards, supporting regulatory requirements.
- Coarse UNC threading facilitates quick engagement and reduces cross-threading risks, ideal for rapid production lines.
Professional Applications & Engineering Value
This 4-40 UNC steel hex head screw is engineered to address critical challenges in demanding sectors like aerospace, automotive, and heavy machinery. Its cadmium plating combats corrosion in exposed or chemically aggressive settings, while the Class 3A thread fit and 160,000 PSI tensile strength prevent loosening under dynamic loads and vibrations. The partially threaded design allows for precise clamping force control, making it ideal for assemblies requiring secure fastening without over-torquing. By meeting NAS1801-04-8 specifications, it ensures reliability in critical applications, reducing downtime and maintenance costs for industrial operations.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 3A fit for high precision, a 1/2" length, and partial threading up to 7/16". It complies with NAS1801-04-8 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence.
