S-94066A108 4-40 x 3/8" 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
- Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments.
- High mechanical strength and durability with a tensile strength of 80,000 psi and Rockwell B96 hardness for reliable, long-term fastening.
- Secure and easy installation provided by the drilled spanner drive and fully threaded UNC coarse thread design.
- Precise and reliable thread fit ensured by the Class 2A thread standard, reducing the risk of cross-threading and assembly issues.
- Versatile pan head design with a standard rounded profile offers a low-profile, aesthetically pleasing finish for various applications.
- Compliance with major industry standards including ASME B18.6.3, ensuring consistent quality and performance.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 4-40 UNC rounded head screws provide a robust fastening solution where reliability is critical. The 18-8 Stainless Steel material, combined with a passivated finish, offers superior protection against oxidation and chemical exposure, making them ideal for applications in machinery, electronics, and outdoor equipment. The fully threaded coarse UNC thread and Class 2A fit ensure quick assembly and vibration resistance, reducing maintenance needs. The drilled spanner drive allows for secure torque application, minimizing slippage and damage during installation. These features collectively address common engineering challenges such as fastener failure, corrosion, and installation efficiency, providing long-term value in industrial fastening applications.
Specification Summary & Compliance
This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse threading, ensuring compatibility and ease of use. Manufacturing and quality are governed by ASME B18.6.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global supply chains.
