S-90276A857 2-56 x 1/4" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc-plated steel construction, extending service life in demanding industrial environments
• Superior holding power with 60,000 psi tensile strength and Rockwell B69 hardness for reliable fastening in high-stress applications
• Quick installation and removal with standard slotted drive design compatible with common hand tools
• Optimized thread engagement through Class 2A thread fit and UNC coarse threading for secure connections in various materials
• Reduced surface damage with rounded head profile that minimizes marring on contact surfaces
• Full-length fastening capability with completely threaded 1/4" length for maximum grip range
• Regulatory compliance assurance meeting ASME B18.6.3 standards for dimensional accuracy and quality

Professional Applications & Engineering Value

These zinc-plated steel screws with 2-56 UNC coarse threading provide exceptional value in industrial assembly where vibration resistance and corrosion protection are critical. The rounded head design distributes clamping force evenly while preventing surface damage to sensitive components. With fully threaded construction and Class 2A thread fit, these fasteners deliver consistent performance in metal fabrication, electronics enclosures, and machinery where precise thread engagement is essential. The slotted drive offers compatibility with standard tools while the zinc plating creates a protective barrier against oxidation, making these industrial screws ideal for applications requiring both mechanical strength and environmental durability.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent dimensional accuracy. These 2-56 UNC screws feature right-hand threading with coarse thread spacing and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The inch system measurements ensure proper fitment in standard industrial applications requiring precise 1/4" length fasteners with verified 60,000 psi tensile strength and Rockwell B69 hardness ratings.