S-94066A554 1/4"-20 x 3" 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 with 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh environments.
- Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B96 hardness for demanding applications.
- Secure and tamper-resistant fastening via the drilled spanner drive, providing reliable torque transmission.
- Optimized thread engagement with Class 2A fit and coarse UNC threading for quick assembly and vibration resistance.
- Versatile partial threading allowing for precise clamping force control and reduced thread galling.
- Rounded pan head design for a low-profile, snag-free finish that enhances safety and aesthetics.
- Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial assemblies, these 1/4"-20 UNC Rounded Head Screws address critical challenges in machinery, automotive, and structural applications. The 18-8 Stainless Steel construction, combined with a passivated finish, provides outstanding resistance to oxidation and chemical exposure, reducing maintenance costs and downtime. The drilled spanner drive ensures secure installation in high-torque scenarios, while the partially threaded design minimizes cross-threading risks and allows for accurate tensioning. With a coarse thread spacing and Class 2A thread fit, these screws facilitate rapid installation and maintain integrity under dynamic loads, making them ideal for vibration-prone environments.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 2A tolerance for precise fit and coarse spacing. It is manufactured to ASME B18.6.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
