S-90276A572 1/4"-20 x 4" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing performance
• Precision threading with UNC coarse thread pattern and Class 2A fit ensures smooth installation and secure fastening
• Optimized partial threading design provides enhanced grip strength while reducing material usage
• Standard slotted drive offers compatibility with common tools for straightforward installation and maintenance
• Rounded head profile delivers improved aesthetics and reduced risk of snagging in assembly applications
• Comprehensive compliance with ASME B18.6.3 specifications and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for industrial fastening applications requiring dependable performance, these zinc-plated steel rounded head screws combine material durability with precision engineering. The UNC coarse threading (1/4"-20) with Class 2A thread fit ensures reliable engagement in various materials while the partial threading design concentrates strength where needed most. The slotted drive style maintains compatibility with standard tools, streamlining assembly processes in manufacturing, machinery, and equipment maintenance. The zinc plating provides essential corrosion protection, making these industrial screws suitable for environments where moisture and chemical exposure are concerns. With 4-inch length and rounded head profile, they offer both functional performance and safety in automated assembly lines and structural applications.

Specification Summary & Compliance

This 1/4"-20 x 4" rounded head screw features precise Class 2A thread fit tolerance and UNC coarse thread specification with minimum thread length of 1-1/2 inches. Manufactured to meet ASME B18.6.3 standards for dimensional accuracy and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.