S-90276A539 1/4"-20 x 5/8" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Exceptional 60,000 psi tensile strength ensures reliable performance under high-stress applications
• Rockwell B69 hardness rating provides excellent wear resistance and durability
• Full threading coverage delivers maximum grip and uniform load distribution
• UNC coarse threading with Class 2A fit enables quick assembly and reliable fastening
• Standard slotted drive design allows for easy installation with common tools
• Rounded head profile provides smooth finish and reduces surface damage risks

Professional Applications & Engineering Value

This zinc-plated steel round head screw with UNC coarse threading is engineered to solve critical fastening challenges in industrial settings. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in heavy-duty applications where vibration resistance and long-term durability are paramount. The fully threaded design provides maximum engagement strength, while the slotted drive style offers compatibility with standard installation tools. Ideal for machinery assembly, equipment manufacturing, and structural applications, this 1/4"-20 screw maintains integrity under constant stress while the zinc plating protects against environmental corrosion, reducing maintenance frequency and replacement costs.

Specification Summary & Compliance

This rounded head screw features precise Class 2A thread fit with UNC coarse threading (1/4"-20) and full thread coverage. Manufacturing and dimensional specifications strictly adhere to ASME B18.6.3 standards, ensuring interchangeability and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety requirements for industrial components.