S-94559A157 4-40 x 3/8" Aluminum Oversized-Flange Button Head Hex-Drive Screws
Aluminum Oversized-Flange Button Head Hex-Drive 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 corrosion resistance and lightweight performance with 6061 aluminum construction, ideal for weight-sensitive industrial applications.
- Superior installation torque and stripping resistance provided by the hex drive design, ensuring secure fastening in demanding environments.
- Enhanced load distribution and vibration resistance from the integrated flange, reducing the risk of loosening under dynamic stresses.
- High mechanical strength and durability with a tensile strength of 40,000 psi and Rockwell B40 hardness, suitable for high-stress assemblies.
- Reliable and precise coarse threading with UNC Class 2A fit, facilitating quick assembly and consistent performance in various materials.
- Full compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe use in global industrial markets.
- Versatile right-hand thread design ensures compatibility with standard tools and simplifies maintenance in machinery and equipment.
Professional Applications & Engineering Value
Engineered for precision and reliability, this 4-40 UNC aluminum screw with a flanged rounded head and hex drive addresses common industrial challenges such as component weight reduction and corrosion in harsh environments. The 6061 aluminum material offers an optimal strength-to-weight ratio, making it ideal for aerospace, electronics, and automotive assemblies where lightweight fasteners are critical. Its coarse thread and Class 2A fit ensure easy installation and resistance to vibration, reducing assembly time and maintenance costs. Fully threaded for maximum grip, this screw provides consistent clamping force in applications requiring high tensile strength and durability, while the flange design prevents surface damage and improves stability.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. It is manufactured in accordance with industry specifications, including RoHS 3 (2015/863/EU) with exemption 6(b)-II for lead in aluminum alloys and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for global supply chains.
