S-91772A907 4-40 x 13/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 70,000 psi ensures reliable performance under significant mechanical stress
• Rockwell B70 hardness provides excellent durability and resistance to wear over time
• Fully threaded UNC coarse design delivers superior holding power and faster installation
• Phillips No. 1 drive allows for efficient, secure fastening with standard tools
• Class 2A thread fit guarantees consistent, precise mating with nuts and threaded holes
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met

Professional Applications & Engineering Value

These 4-40 UNC rounded head screws are engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. The passivated 18-8 stainless steel material offers robust protection against rust, while the coarse thread and fully threaded design enhance grip and reduce the risk of stripping in softer materials. With a pan head profile and Phillips drive, they provide a low-profile, secure fit that is easy to install in tight spaces, making them ideal for assembly lines, machinery, and electronic enclosures where reliability and compliance with ASME B18.6.3 standards are critical.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including Class 2A thread fit and UNC coarse thread specifications, ensuring compatibility and performance. Manufactured in compliance with ASME B18.6.3 for mechanical fasteners, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.