S-94066A546 1/4"-20 x 1 1/2" 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, ideal for harsh environments
• Exceptional mechanical strength delivering 80,000 psi tensile strength and Rockwell B96 hardness for reliable, long-term fastening
• Precise Class 2A thread fit with UNC coarse threading ensures easy installation and secure engagement in various materials
• Convenient drilled spanner drive (No. 14 size) allows for tamper-resistant assembly and disassembly in tight spaces
• Fully threaded design provides consistent clamping force along the entire 1-1/2" length for uniform load distribution
• Standard-compliant manufacturing meeting ASME B18.6.3 ensures dimensional accuracy and interchangeability
• Environmental and safety compliance with RoHS 3 and REACH regulations for responsible industrial use

Professional Applications & Engineering Value

This 1/4"-20 UNC threaded spanner screw addresses critical industrial fastening challenges where corrosion resistance, tamper-proof installation, and high tensile strength are paramount. The 18-8 stainless steel material, enhanced by a passivated finish, provides excellent protection against oxidation and chemical exposure in demanding settings like marine equipment, food processing machinery, and outdoor structures. The drilled spanner drive offers a secure, low-profile fastening solution that deters unauthorized access, while the coarse UNC threads and Class 2A fit facilitate quick assembly and reduce cross-threading risks. Fully threaded along its 1-1/2" length, it ensures maximum thread engagement and vibration resistance in heavy-duty assemblies, making it a reliable choice for OEMs and maintenance teams requiring durable, specification-compliant rounded head screws.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A fit for standard dimensional tolerance and easy mating. Manufactured in accordance with ASME B18.6.3 specifications, it guarantees precision in head diameter (0.492"), head height (0.144"), and overall length (1-1/2"). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for industrial and international use.