S-91773A186 1-72 x 1" ASME B18.6.3 Stainless Steel Round Head Phillips 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
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Precise thread engagement through Class 2A thread fit and UNF fine threading, providing secure fastening and vibration resistance
• Optimized drive performance with No. 0 Phillips drive and rounded head design for efficient installation and reduced cam-out
• Full thread coverage across the entire 1" length for maximum grip and load distribution
• Industry compliance assurance meeting ASME B18.6.3 standards for dimensional accuracy and performance reliability
• Environmental regulation compliance with RoHS 3 and REACH adherence for safe use across global markets

Professional Applications & Engineering Value

These 1-72 UNF rounded head screws deliver critical performance advantages in precision assembly applications where corrosion resistance and mechanical integrity are paramount. The combination of 18-8 stainless steel material with passivated finish provides exceptional protection against oxidation and chemical exposure, making them ideal for electronics enclosures, medical devices, and marine components. The fine UNF threading and Class 2A thread fit ensure precise engagement in tapped holes, reducing the risk of cross-threading while maintaining consistent clamping force. The rounded head profile with Phillips drive offers streamlined installation in confined spaces while minimizing surface protrusion. These fully threaded fasteners are engineered to solve vibration-induced loosening challenges in dynamic assemblies, providing reliable performance in industrial machinery, aerospace components, and precision instrumentation where fastener failure is not an option.

Specification Summary & Compliance

This 1-72 UNF screw features precision Class 2A thread fit tolerances with right-hand UNF fine threading (72 threads per inch) and full threading along the 1" length. Manufacturing complies with ASME B18.6.3 dimensional standards, ensuring interchangeability and proper function. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety, making them suitable for international industrial applications requiring environmental compliance.