S-90271A550 1/4"-20 x 2" ASME B18.6.3 Steel Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• Enhanced load distribution from the wide truss head design, reducing surface pressure and material damage
• High tensile strength of 60,000 psi ensures reliable performance under heavy mechanical stress
• Easy installation and removal with standard slotted drive, compatible with common hand tools
• Secure fastening with Class 2A thread fit providing consistent engagement and vibration resistance
• Full threading along the 2" length offers maximum grip depth and adjustment flexibility
• Rockwell B69 hardness maintains structural integrity against wear and deformation

Professional Applications & Engineering Value

This zinc-plated steel truss head screw with 1/4-20 UNC coarse threading is engineered to address common industrial fastening challenges. The wide truss head design significantly increases bearing surface area, preventing pull-through in soft materials like sheet metal or plastics while distributing clamp load evenly. The fully threaded 2" length and Class 2A thread fit ensure precise engagement in deep-tapped holes or stacked components, maintaining joint integrity in high-vibration environments such as machinery assembly, electrical enclosures, and automotive applications. The zinc plating provides essential corrosion protection for both indoor and moderately corrosive settings, while the 60,000 psi tensile strength handles dynamic loads without failure.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with UNC coarse threads and Class 2A thread fit for consistent dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. Features include right-hand threading, slotted drive style, and full compliance with industrial standards for reliable integration into professional assemblies.