S-91772A564 1/4"-28 x 1 1/2" 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 fine threading (1/4"-28 UNF) with Class 2A fit ensures secure fastening and vibration resistance in critical assemblies
• Optimized drive efficiency with Phillips No. 3 drive style providing excellent torque transfer and reduced cam-out risk
• Full threading along 1-1/2" length delivers maximum grip and adjustment flexibility in various material thicknesses
• Industry-standard compliance with ASME B18.6.3 specifications guarantees dimensional accuracy and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH ensures safe use in regulated industries worldwide

Professional Applications & Engineering Value

This 1/4"-28 UNF pan head machine screw delivers critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction prevents oxidation in humid or chemical-exposed environments, while the fine thread configuration maintains clamping force under vibration-intensive conditions common in industrial machinery, automotive assemblies, and electronic enclosures. The combination of fully threaded design and Phillips No. 3 drive enables rapid installation across varying material depths without compromising torque transmission. These industrial screws are engineered to address common failure points in rounded head screw applications, providing lasting performance in manufacturing equipment, marine hardware, and food processing systems where regular maintenance is challenging.

Specification Summary & Compliance

Manufactured to exact ASME B18.6.3 standards with Class 2A thread fit ensuring precise dimensional tolerances and interchangeability. The UNF fine thread (1/4"-28) maintains consistent pitch accuracy for secure fastening applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental safety and restricted substance adherence. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness for guaranteed performance in demanding industrial applications.