S-90280A542 1/4"-20 x 1" ASME B18.6.3 Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness to withstand high-stress applications
• Precision thread engagement with Class 2A fit and UNC coarse threads for reliable fastening and reduced cross-threading risk
• Optimized head design featuring a high, narrow fillister profile for enhanced tool engagement and flush mounting capability
• Full threading along 1" length provides maximum grip and load distribution across the entire fastener
• Comprehensive compliance with ASME B18.6.3 manufacturing standards and environmental regulations including RoHS 3 & REACH
• Right-hand thread direction ensures standard installation compatibility across industrial equipment and machinery

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these zinc-plated steel rounded head slotted screws deliver critical corrosion protection where moisture and chemical exposure compromise fastener integrity. The 1/4"-20 UNC coarse thread configuration provides superior holding power in soft materials and rapid installation in production settings. With full threading along the entire 1" length, these fasteners distribute clamp load evenly, preventing joint loosening under vibration. The distinctive fillister head profile offers deeper tool engagement for increased torque transmission while maintaining a low-profile installation. These characteristics make them ideal for machinery assembly, electrical enclosures, and automotive components where high-strength fastening with environmental compliance is mandatory.

Specification Summary & Compliance

This 1/4"-20 UNC screw maintains precision Class 2A thread fit tolerances per ASME B18.6.3 specifications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring restricted substance compliance. The fastener features fully threaded construction with coarse thread spacing and right-hand thread direction for standardized industrial applications.