S-91772A133 5-40 x 1" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• High tensile strength of 70,000 psi ensures reliable fastening under significant mechanical stress, reducing the risk of joint failure.
• Class 2A thread fit provides consistent, easy assembly and disassembly while maintaining secure connections in general-purpose applications.
• Fully threaded design offers maximum grip and holding power along the entire 1" length for versatile fastening solutions.
• Coarse UNC thread pattern enables quick installation and superior performance in softer materials or where vibration resistance is needed.
• Rockwell B70 hardness provides excellent durability and wear resistance, extending the screw's service life in demanding conditions.
• Phillips No. 2 drive with rounded pan head delivers secure tool engagement and a low-profile finish that minimizes snagging in assembled products.

Professional Applications & Engineering Value

These 5-40 UNC rounded head screws deliver critical engineering value through their passivated 18-8 stainless steel composition, which provides exceptional corrosion resistance in challenging environments including marine, chemical processing, and food equipment applications. The coarse thread design ensures rapid installation and superior vibration resistance, while the fully threaded configuration maximizes load distribution across the entire fastener length. The combination of 70,000 psi tensile strength and Rockwell B70 hardness addresses common industrial pain points including material fatigue, thread stripping, and premature failure in high-stress assemblies. These pan head screws with Phillips No. 2 drive are engineered for efficient installation in automated or manual assembly processes across machinery, electronics, and structural applications where reliability is paramount.

Specification Summary & Compliance

This fastener features precision Class 2A thread fit with UNC coarse threading (5-40 size) and meets ASME B18.6.3 manufacturing specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. Manufacturing adheres to strict dimensional tolerances with 1" length, 0.125" thread diameter, and standardized rounded pan head profile for consistent performance across applications.