S-90276A128 5-40 x 1/2" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable performance under significant mechanical stress
• Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in various materials
• Fully threaded design offers maximum grip length and consistent holding power along the entire shank
• Slotted drive rounded head allows for easy installation with standard tools while providing a finished appearance
• Compliance with multiple standards ensures quality, safety, and environmental responsibility in industrial applications

Professional Applications & Engineering Value

These 5-40 UNC zinc-plated steel rounded head screws deliver exceptional engineering value across industrial applications where corrosion resistance and high tensile strength are critical. The coarse thread design provides superior holding power in softer materials and enables faster assembly cycles, while the slotted drive offers compatibility with standard installation tools. The fully threaded configuration ensures maximum engagement in through-holes and tapped applications, making these industrial screws ideal for machinery assembly, electrical enclosures, and equipment manufacturing where vibration resistance and long-term reliability are essential. The zinc plating creates a protective barrier against oxidation, extending service life in environments exposed to moisture or chemical exposure.

Specification Summary & Compliance

These fasteners feature precision Class 2A thread fit with UNC coarse threads (5-40 thread size) and are manufactured to exact dimensional standards. The screws comply with ASME B18.6.3 specifications for dimensional requirements and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring they meet current environmental regulations for hazardous substances. The 1/2" length and 0.236" head diameter provide consistent dimensional accuracy for reliable performance in industrial assembly applications.