S-94559A611 5/16"-18 x 1/2" 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 for extended service life in demanding environments
- Enhanced load distribution through integrated flange design that eliminates the need for separate washers
- High tensile strength rated at 40,000 PSI ensures reliable performance under substantial mechanical stress
- Quick installation with hex drive design providing secure tool engagement and efficient assembly
- Optimized thread engagement through UNC coarse threading that resists loosening in vibration-prone applications
- Consistent performance with Class 2A thread fit ensuring precise dimensional accuracy and reliable fastening
- Environmental compliance meeting RoHS 3 and REACH standards for sustainable manufacturing practices
Professional Applications & Engineering Value
This 6061 aluminum flanged hex drive screw delivers exceptional value in industrial applications where weight reduction, corrosion resistance, and reliable fastening are critical. The rounded head design with integrated flange provides superior bearing surface distribution, preventing surface damage while eliminating the need for additional washers - streamlining assembly processes in electronics enclosures, machinery panels, and transportation equipment. The UNC coarse threading (5/16"-18) ensures rapid installation and superior resistance to vibration-induced loosening, while the hex drive configuration allows for high-torque application without cam-out issues. Manufactured from 6061 aluminum alloy, these screws offer an optimal strength-to-weight ratio perfect for applications where both structural integrity and weight savings are engineering priorities.
Specification Summary & Compliance
This fastener features Class 2A thread fit tolerance per UNC standards with 5/16"-18 coarse threading and right-hand thread direction. The screw meets RoHS 3 (2015/863/EU) compliance with exemption 6(b)-II for lead as an alloying element in aluminum, along with full REACH (EC 1907/2006) compliance for environmental safety. Manufacturing specifications include Rockwell B40 hardness and dimensional accuracy across all critical parameters including head diameter (0.38"), length (1/2"), and flange dimensions (1" diameter).
