S-94066A540 1/4"-20 x 3/4" ASME B18.6.3 Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws
Tamper-Resistant Drilled Spanner Stainless Steel Pan 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 from 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness for reliable, heavy-duty fastening
- Secure tool engagement through drilled spanner drive design, preventing slippage during installation and removal
- Wide compatibility with UNC coarse 1/4"-20 threading and Class 2A fit, ensuring easy assembly and interchangeability
- Optimized load distribution from the rounded pan head design, reducing surface damage and improving joint integrity
- Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, meeting strict industrial and environmental standards
- Complete thread coverage along the 3/4" length for maximum grip and uniform stress distribution in applications
Professional Applications & Engineering Value
Engineered for demanding environments, these 18-8 stainless steel rounded head screws address critical challenges in industrial assembly. The passivated finish enhances corrosion resistance, making them suitable for outdoor equipment, marine hardware, and chemical processing facilities where moisture and corrosive agents are prevalent. The UNC coarse thread and Class 2A fit facilitate quick installation and reduce cross-threading risks, while the drilled spanner drive ensures secure torque application in high-vibration settings. With a tensile strength of 80,000 psi, they provide reliable performance in structural applications, machinery frames, and heavy-duty enclosures, minimizing failure risks and maintenance downtime.
Specification Summary & Compliance
This screw adheres to ASME B18.6.3 specifications, with precise UNC 1/4"-20 coarse threads and Class 2A thread fit for consistent dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. The product meets all stated mechanical properties, including Rockwell B96 hardness and 80,000 psi tensile strength, as per industry standards.
