S-94559A165 4-40 x 3/4" 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
- Superior corrosion resistance with 6061 aluminum construction, ideal for harsh industrial environments
- Enhanced load distribution through the integrated flange, reducing surface pressure and material damage
- High-strength performance with 40,000 psi tensile strength and Rockwell B40 hardness for reliable fastening
- Quick installation and removal using the 1/16" hex drive, minimizing assembly time
- Precise thread engagement with Class 2A UNC coarse threads ensuring secure fits in various materials
- Full threading versatility allowing adjustable positioning along the entire 3/4" length
- Regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 4-40 UNC rounded head flanged screws deliver exceptional value in assembly operations where weight reduction and corrosion resistance are critical. The 6061 aluminum construction provides excellent strength-to-weight ratio while resisting environmental degradation. The integrated flange eliminates the need for separate washers, distributing clamp load evenly and preventing surface damage in sensitive components. With coarse UNC threads and Class 2A fit, these screws offer reliable engagement in soft materials and blind holes, reducing cross-threading risks. The hex drive design ensures positive torque transmission during high-volume assembly, making them ideal for electronics enclosures, machinery panels, and automotive components where precision fastening and regulatory compliance are paramount.
Specification Summary & Compliance
This 4-40 UNC screw features precise Class 2A thread fit with coarse thread spacing and right-hand threading. Manufacturing adheres to standard inch system specifications with fully threaded 3/4" length and dimensional accuracy. The product demonstrates full compliance with RoHS 3 (2015/863/EU) under exemption 6(b)-II for lead as an alloying element in aluminum, and meets REACH (EC 1907/2006) requirements as of January 17, 2023, ensuring environmental responsibility and workplace safety standards.
