S-94066A535 1/4"-20 x 3/8" 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 industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness for reliable performance under heavy loads
• Precise Class 2A thread fit ensures smooth installation and secure fastening in demanding applications
• Convenient drilled spanner drive (No. 14 size) enables easy installation and removal with standard tools
• Fully threaded design provides maximum grip and holding power across the entire fastener length
• Industry-standard compliance with ASME B18.6.3 specifications guarantees consistent quality and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards for safe, sustainable manufacturing

Professional Applications & Engineering Value

This 1/4"-20 UNC stainless steel rounded head screw delivers exceptional engineering value in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel material combined with passivated finish creates a robust barrier against oxidation and chemical exposure, making it ideal for machinery, marine equipment, and food processing applications. The coarse UNC thread and Class 2A thread fit ensure rapid installation and vibration resistance, while the drilled spanner drive provides secure tool engagement without stripping. With fully threaded construction and pan head design, this fastener maintains consistent clamping force and distributes pressure evenly, solving common assembly challenges in heavy-duty manufacturing and maintenance operations.

Specification Summary & Compliance

This high-performance fastener features precise Class 2A thread fit with 1/4"-20 UNC coarse threads and right-hand threading direction. Manufactured to ASME B18.6.3 specifications, it ensures dimensional accuracy and mechanical consistency. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its safety for various industrial applications while maintaining the highest quality standards for professional use.