S-90271A539 1/4"-20 x 5/8" ASME B18.6.3 Steel Truss Head Slotted Screws
Steel Truss Head Slotted Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- High tensile strength of 60,000 PSI ensures reliable load-bearing capacity and joint integrity
- Wide truss head design provides excellent load distribution and prevents pull-through in softer materials
- Class 2A thread fit offers optimal assembly tolerance for smooth installation and consistent performance
- Fully threaded UNC coarse thread enables faster installation and superior holding power
- Rockwell B69 hardness rating maintains thread integrity and prevents stripping during repeated use
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental safety
Professional Applications & Engineering Value
These zinc-plated steel rounded truss head screws are engineered to address critical industrial fastening challenges where corrosion resistance and reliable clamping force are paramount. The wide truss head design distributes load over a larger surface area, preventing material deformation in sheet metal, plastic components, and electrical enclosures. With UNC coarse threads and Class 2A fit, these 1/4-20 fully threaded screws provide rapid installation in production environments while maintaining consistent torque performance. The combination of 60,000 PSI tensile strength and Rockwell B69 hardness ensures these fasteners withstand vibration and mechanical stress in automotive assemblies, machinery frames, and construction applications where durability is non-negotiable.
Specification Summary & Compliance
This 1/4-20 x 5/8" screw features Class 2A thread fit per UNC standards with fully threaded coarse spacing for optimal engagement. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
