S-90271A203 8-32 x 1 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, extending service life in demanding industrial environments
• Enhanced load distribution from the wide rounded truss head design, reducing surface damage and material stress
• High tensile strength of 60,000 psi ensures reliable performance under heavy mechanical loads and vibrations
• Rockwell B69 hardness rating provides excellent wear resistance and maintains thread integrity during repeated use
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening in various materials
• Full threading along the 1½" length offers maximum grip and adjustment flexibility in deep applications
• Slotted drive compatibility allows for straightforward installation using standard hand tools

Professional Applications & Engineering Value

Engineered for industrial fastening applications requiring both mechanical strength and environmental compliance, these zinc-plated steel screws address critical challenges in assembly operations. The combination of UNC coarse threads and Class 2A thread fit ensures rapid installation while maintaining precise tolerances, significantly reducing assembly time in high-volume production environments. The rounded truss head design distributes clamping force over a wider surface area, preventing material deformation in softer substrates and sheet metal applications. With full threading along the entire shank, these fasteners provide consistent engagement depth in variable material thicknesses, making them ideal for electrical enclosures, machinery guards, and structural assemblies where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit ensuring dimensional accuracy and interchangeability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, containing no restricted substances above threshold limits. The 8-32 UNC coarse thread configuration maintains standard inch system compatibility while the zinc-plated surface treatment provides consistent corrosion protection. All dimensional tolerances including head diameter (0.384") and length (1½") are maintained within industrial fastener specifications for reliable performance.