S-91773A098 3-48 x 5/8" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing performance
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure, vibration-resistant fastening
• Optimized drive efficiency using Phillips No. 1 drive for controlled torque application and reduced cam-out risk
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire 5/8" length
• Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These 3-48 UNC rounded head screws deliver critical performance advantages in industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of 18-8 stainless steel material and passivated surface treatment creates a robust barrier against chemical exposure and atmospheric corrosion, significantly extending service life in demanding applications. The fully threaded design with UNC coarse threads ensures rapid installation and superior holding power in various substrates, while the rounded head profile with Phillips drive facilitates flush mounting and efficient assembly operations. These fasteners are engineered to maintain integrity under continuous stress, making them ideal for precision equipment, electrical enclosures, and machinery where vibration resistance and long-term fastener performance are critical operational requirements.

Specification Summary & Compliance

This rounded head screw maintains precise Class 2A thread fit tolerances according to UNC standards, ensuring consistent engagement and reliable performance. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for use in regulated industries and international markets.