S-91772A909 4-48 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precision thread engagement through Class 2A thread fit and UNF fine threads ensuring secure fastening in critical applications
• Optimized drive efficiency with Phillips No. 1 drive and pan head design for straightforward installation and reduced cam-out
• Full thread coverage along the 3/4" length provides maximum grip and distribution of clamping force
• Regulatory compliance assurance meeting ASME B18.6.3 standards and RoHS 3/REACH environmental directives
• Versatile right-hand threading compatible with standard assembly procedures across various industries

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 4-48 UNF fine thread pan head screws deliver exceptional performance where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics, precision machinery, and outdoor equipment applications. The combination of fully threaded design and Class 2A thread fit ensures consistent clamping force distribution and prevents loosening under vibration. With their Phillips No. 1 drive and rounded pan head profile, these screws offer efficient installation while maintaining a low-profile appearance. The fine thread configuration provides enhanced engagement in thin materials and delicate components, solving common challenges of strip-out and weak fastening points in precision assemblies.

Specification Summary & Compliance

This pan head Phillips screw features precise 4-48 UNF fine threads with Class 2A thread fit tolerance for consistent engagement. Manufactured from passivated 18-8 stainless steel with dimensions of 3/4" length, 0.219" head diameter, and 0.08" head height. The product complies with ASME B18.6.3 mechanical standards and demonstrates environmental responsibility through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring suitability for regulated industrial applications worldwide.