S-91772A187 1-72 x 1" 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 and outdoor applications.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions.
• Precise and secure fastening thanks to the Class 2A fit UNF fine thread, ensuring tight, vibration-resistant connections.
• Efficient installation and removal with the No. 0 Phillips drive and rounded pan head design, reducing tool slippage and assembly time.
• Full-length threading provides consistent grip along the entire 1" length, maximizing holding power in various material thicknesses.
• Compliance with major industry standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This 1-72 UNF machine screw is engineered to address critical fastening challenges in demanding industrial settings. The passivated 18-8 stainless steel offers excellent resistance to oxidation and chemical exposure, making it suitable for applications in marine, automotive, and electronics assembly where corrosion resistance is paramount. The fine UNF threading and Class 2A fit provide superior thread engagement and clamping force, reducing the risk of loosening under vibration—common in machinery and equipment. The combination of 70,000 psi tensile strength and a fully threaded design ensures reliable performance in high-stress connections, while the rounded pan head with Phillips drive facilitates quick, secure installation without damaging the fastener or workpiece. Ideal for precision assemblies requiring durable, compliant, and high-strength industrial screws.

Specification Summary & Compliance

This screw adheres to ASME B18.6.3 specifications, ensuring precise dimensional standards for rounded head screws. Threading conforms to UNF (Unified National Fine) standards with a Class 2A tolerance for consistent fit. The passivated finish on 18-8 stainless steel enhances durability. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety regulations for industrial use.