S-94559A511 1/4"-20 x 1/2" Aluminum Oversized-Flange Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 6061 aluminum construction, ideal for harsh industrial environments
• High tensile strength of 40,000 psi ensures reliable performance in demanding applications
• Flanged design eliminates need for separate washers, speeding up assembly and reducing component count
• Hex drive with 5/32" size provides secure tool engagement and prevents stripping during installation
• UNC coarse threading with Class 2A fit enables quick installation and superior vibration resistance
• Rounded button head profile offers a finished appearance while preventing snagging
• Full regulatory compliance with RoHS 3 and REACH ensures environmental responsibility

Professional Applications & Engineering Value

This 6061 aluminum rounded head screw delivers optimal performance in machinery assembly, electronic enclosures, and industrial equipment where corrosion resistance and weight reduction are critical. The flanged design distributes clamping force evenly, preventing surface damage while the UNC coarse thread provides excellent engagement in aluminum and soft materials. With Rockwell B40 hardness and 40,000 psi tensile strength, this hex drive fastener maintains integrity under vibration and load stress. The right-hand thread direction and Class 2A thread fit ensure compatibility with standard industrial components while the rounded head profile enhances safety in exposed applications.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse threading (1/4"-20). Full compliance with RoHS 3 (2015/863/EU) under exemption 6(b)-II and REACH (EC 1907/2006) regulations. The 6061 aluminum material meets industry standards for mechanical fasteners with consistent Rockwell B40 hardness and 40,000 psi tensile strength verification.