S-90276A548 1/4"-20 x 1 3/4" 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
• Excellent holding power provided by 60,000 psi tensile strength and Rockwell B69 hardness for reliable fastening performance
• Quick installation and removal with standard slotted drive design for compatibility with common tools
• Optimal thread engagement through fully threaded UNC coarse thread design that resists loosening under vibration
• Precise fit and compatibility ensured by Class 2A thread fit for consistent performance in industrial applications
• Enhanced load distribution from rounded head profile that minimizes surface damage during tightening
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global applications

Professional Applications & Engineering Value

This zinc-plated steel round head screw delivers exceptional engineering value for industrial assembly applications where vibration resistance and corrosion protection are critical. The 1/4-20 UNC coarse thread configuration provides superior grip in various materials, while the fully threaded design ensures maximum holding strength across the entire fastener length. The slotted drive style offers compatibility with standard tools, making it ideal for maintenance, machinery assembly, and equipment manufacturing. With 60,000 psi tensile strength and Rockwell B69 hardness, this screw withstands substantial mechanical stress, preventing failure in high-vibration environments common in industrial settings. The rounded head profile distributes clamping force evenly, protecting assembled surfaces from damage during installation and service.

Specification Summary & Compliance

This 1/4-20 x 1-3/4" round head screw features precise Class 2A thread fit with UNC coarse threading (20 threads per inch) and right-hand thread direction. Manufactured to ASME B18.6.3 specifications with dimensional accuracy including 0.472" head diameter and 0.175" head height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.