S-90287A540 1/4"-20 x 3/4" ASME B18.6.3 Tamper-Resistant One-Way-Drive Steel Round Head Screws
Tamper-Resistant One-Way-Drive Steel Round Head 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 plating, extending service life in harsh industrial environments
- High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and vibration
- Rockwell B70 hardness provides excellent wear resistance and durability for repeated use
- Class 2A thread fit with UNC coarse threading offers quick assembly and secure fastening in various materials
- Fully threaded design maximizes grip and load distribution across the entire length
- One-way drive style enhances tamper resistance in security-sensitive applications
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality and environmental safety for global supply chains
Professional Applications & Engineering Value
This zinc-plated steel rounded head screw is engineered to address common industrial challenges such as corrosion, high-stress fatigue, and assembly efficiency. The UNC coarse thread and Class 2A fit enable rapid installation in metal, wood, and plastic components, reducing labor time while maintaining secure connections. With a 60,000 PSI tensile strength and Rockwell B70 hardness, it withstands dynamic loads in machinery, automotive assemblies, and construction frameworks. The fully threaded design ensures uniform stress distribution, minimizing loosening in vibrating environments. Ideal for heavy-duty fastening in manufacturing, HVAC systems, and outdoor equipment, this screw delivers long-term reliability and compliance with stringent industry standards.
Specification Summary & Compliance
This fastener features precise Class 2A thread fit and UNC coarse threading with a diameter of 1/4"-20 and length of 3/4". It meets ASME B18.6.3 specifications for dimensional accuracy and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to for industrial use.
