S-94066A542 1/4"-20 x 1" ASME B18.6.3 Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• High mechanical strength offering 80,000 psi tensile strength and Rockwell B96 hardness for demanding industrial applications.
• Secure and tamper-resistant installation via the drilled spanner drive, providing enhanced grip and control during assembly.
• Optimized thread engagement with fully threaded 1/4"-20 UNC coarse threads and Class 2A fit, enabling quick assembly and reliable fastening.
• Durable rounded pan head design that distributes load evenly and resists socket slippage, improving installation safety.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring product safety and regulatory acceptance.
• Right-hand threading for standard applications, facilitating straightforward installation and compatibility with common equipment.

Professional Applications & Engineering Value

Engineered for industrial and heavy-duty applications, this 1/4"-20 UNC stainless steel rounded head screw addresses critical challenges like vibration loosening and corrosion. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to rust and chemical exposure, making it ideal for machinery, outdoor equipment, and assembly lines. Its coarse UNC threading and Class 2A thread fit ensure rapid installation and secure holding power, reducing downtime. The drilled spanner drive offers reliable torque transmission, minimizing the risk of tool slippage in high-stress environments. This screw delivers consistent performance in construction, automotive, and manufacturing sectors, where durability and compliance with ASME B18.6.3 standards are paramount.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and 1/4"-20 UNC coarse threading in accordance with ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. Manufactured in the inch system, it guarantees dimensional accuracy for reliable performance in standardized industrial assemblies.