S-90287A542 1/4"-20 x 1" 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-plated steel construction for extended service life in demanding environments
- High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and vibration
- Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit with UNC coarse threading enables faster assembly and reduced cross-threading risk
- Fully threaded design offers maximum grip and holding power across the entire 1" length
- Rounded head profile allows for easier installation in confined spaces and provides a finished appearance
- Compliance with ASME B18.6.3 guarantees consistent quality and dimensional accuracy for industrial applications
Professional Applications & Engineering Value
These 1/4-20 UNC zinc-plated steel screws deliver exceptional engineering value for industrial fastening applications where corrosion resistance and high strength are critical. The combination of zinc-plated steel material and coarse thread spacing provides superior performance in metal-to-metal assemblies, machinery components, and structural frameworks. The fully threaded design ensures maximum engagement in both thick and thin materials, while the rounded head style facilitates installation in tight spaces without compromising on holding power. These industrial screws are engineered to withstand vibration, heavy loads, and harsh environmental conditions, making them ideal for manufacturing equipment, automotive assemblies, and construction applications where reliability is paramount.
Specification Summary & Compliance
These rounded head screws feature precise Class 2A thread fit with UNC coarse threading (1/4"-20) and are manufactured to ASME B18.6.3 specifications for dimensional accuracy. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet the latest industrial safety and sustainability standards for global procurement requirements.
