S-91773A092 3-48 x 1/4" 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 for extended service life in harsh environments
• Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under load
• Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized drive efficiency through Phillips No. 1 drive design providing positive torque transmission and reduced cam-out
• Full threading capability along the entire 1/4" length for maximum grip range and installation flexibility
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Rounded head design offering smooth surface profile and reduced risk of snagging in assembled applications

Professional Applications & Engineering Value

These 3-48 UNC rounded head Phillips screws deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel base material combined with passivated surface treatment creates a protective oxide layer that significantly enhances corrosion resistance in industrial environments exposed to moisture, chemicals, and temperature variations. The coarse UNC thread form with Class 2A tolerance ensures rapid installation and secure fastening in materials where fine threads might strip or fail. Particularly valuable in electronics enclosures, instrumentation panels, and precision mechanical assemblies, these fully threaded fasteners provide consistent clamping force across the entire engagement length. The rounded head profile minimizes protrusion while the Phillips drive system offers familiar, efficient installation using standard driving tools common in manufacturing and maintenance operations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit per UNC specifications, ensuring consistent mating with corresponding threaded components. The 3-48 thread size with coarse pitch and right-hand direction follows established industrial threading conventions. Compliance with ASME B18.6.3 manufacturing standards guarantees dimensional accuracy and mechanical performance. Environmental regulatory adherence includes RoHS 3 (2015/863/EU) compliance for restricted substance management and REACH (EC 1907/2006) compliance for chemical safety, making these screws suitable for global supply chains and environmentally conscious manufacturing operations.