S-97124A145 4-40 x 1" ASME B18.6.3 Aluminum Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio with 2024 aluminum construction and 50,000 psi tensile strength for reliable performance in demanding applications
• Precise flush mounting capability thanks to the standard 82° countersink angle and flat head design that sits perfectly flush with surfaces
• Superior thread engagement with Class 2A thread fit and coarse UNC threading ensuring secure fastening and vibration resistance
• Full-length threading provides maximum grip along the entire 1" length for enhanced load distribution and holding power
• Optimized drive performance with Phillips No. 1 drive style offering reliable torque transfer and reduced cam-out risk
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Industry-standard compatibility manufactured to ASME B18.6.3 specifications for guaranteed interchangeability and quality

Professional Applications & Engineering Value

These 4-40 UNC flat head Phillips screws deliver exceptional engineering value in precision applications where weight reduction and corrosion resistance are critical. The 2024 aluminum construction provides Rockwell B55 hardness and maintains structural integrity while significantly reducing overall assembly weight compared to steel alternatives. The fully threaded design ensures maximum surface contact for superior vibration resistance in dynamic environments, while the standard 82° countersink angle creates seamless flush mounting in aerospace, electronics, and precision machinery applications. The coarse thread spacing and Class 2A thread fit facilitate quick installation and reliable performance in materials where fine threads might strip or fail, making these industrial screws ideal for production lines requiring both speed and reliability.

Specification Summary & Compliance

This flat head screw features precision Class 2A thread fit with UNC coarse thread spacing and right-hand threading. Manufactured to ASME B18.6.3 specifications with dimensional accuracy including 0.215" head diameter, 0.067" head height, and 1" fully threaded length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries and international markets.