S-90279A537 1/4"-20 x 1/2" ASME B18.6.3 Steel Round Head Phillips 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 fastening under significant mechanical stress
• Rockwell B69 hardness rating provides excellent durability and resistance to wear
• Full threading design offers maximum grip and holding power throughout the entire fastener length
• Class 2A thread fit guarantees precise, consistent engagement with mating components
• Phillips No. 3 drive enables efficient installation with standard industrial tools
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH regulations for quality assurance

Professional Applications & Engineering Value

Engineered for industrial applications requiring reliable fastening solutions, these zinc-plated steel screws combine material strength with protective coating to combat corrosion in manufacturing, assembly, and maintenance environments. The 1/4-20 UNC coarse thread configuration ensures quick assembly and superior vibration resistance, while the fully threaded design provides consistent clamping force across the entire engagement length. The rounded head profile with Phillips drive offers streamlined installation without snagging, making these industrial screws ideal for machinery, equipment frames, and structural components where 60,000 psi tensile strength and Rockwell B69 hardness deliver long-term performance reliability.

Specification Summary & Compliance

This fastener features Class 2A thread fit tolerance with 1/4"-20 UNC coarse threads and right-hand threading direction. Manufacturing complies with ASME B18.6.3 specifications, ensuring dimensional accuracy and performance consistency. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations, confirming environmental and safety standards adherence for industrial applications.