S-90271A552 1/4"-20 x 2 1/2" ASME B18.6.3 Steel Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Enhanced load distribution from the wide truss head design that reduces surface pressure and prevents material damage
• High tensile strength of 60,000 psi ensures reliable performance under heavy mechanical stress and vibration
• Easy installation and removal with standard slotted drive compatible with common hand tools
• Precise Class 2A thread fit provides consistent engagement and reduces cross-threading risks in assembly operations
• Full threading along 2-1/2" length offers maximum adjustment flexibility and grip depth in various material thicknesses
• Compliance with major industrial standards including ASME B18.6.3 guarantees interchangeability and quality consistency

Professional Applications & Engineering Value

This zinc-plated steel truss head screw delivers exceptional engineering value through its optimized material and design characteristics. The UNC coarse threading with Class 2A fit ensures rapid installation in production environments while maintaining precise thread engagement. The distinctive wide truss head profile provides significantly larger bearing surface compared to standard rounded heads, effectively distributing clamp load across broader areas - a critical advantage when fastening into softer materials or thin-gauge metals where surface deformation is a concern. With 60,000 psi tensile strength and Rockwell B69 hardness, these fully threaded screws maintain structural integrity in high-vibration applications such as machinery guards, electrical enclosures, and transportation equipment. The combination of slotted drive simplicity and right-hand threading makes them ideal for maintenance operations where tool availability may be limited.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance and UNC coarse thread profile (1/4"-20). Full compliance with ASME B18.6.3 specifications ensures mechanical reliability and dimensional consistency. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for restricted substance control. The zinc-plated steel construction provides corrosion protection while maintaining the 60,000 psi tensile strength rating required for industrial fastening applications.