S-91400A541 1/4"-20 x 7/8" FF-S-92, QQ-P-35, MS51957-82 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 tensile strength of 80,000 psi ensures reliable performance in demanding applications
• Easy installation and removal with Phillips No. 3 drive design for efficient assembly operations
• Optimized thread engagement through UNC coarse threading and Class 2A fit for secure fastening
• Full-threaded design provides maximum grip length and uniform stress distribution
• Comprehensive compliance with RoHS 3 and REACH environmental regulations for global market acceptance
• Standard pan head profile offers excellent bearing surface while maintaining low-profile appearance

Professional Applications & Engineering Value

This 18-8 stainless steel pan head screw delivers critical performance advantages in industrial settings where corrosion resistance and mechanical strength are paramount. The passivated surface treatment significantly enhances the natural corrosion resistance of stainless steel, making these Phillips drive screws suitable for applications exposed to moisture, chemicals, or outdoor elements. The UNC coarse thread design ensures rapid installation and superior resistance to vibration loosening, while the fully threaded construction provides consistent clamping force across the entire fastener length. These rounded head screws are particularly valuable in machinery assembly, electrical enclosures, and structural frameworks where reliable, long-term fastening solutions are essential for operational safety and maintenance efficiency.

Specification Summary & Compliance

This 1/4"-20 x 7/8" pan head Phillips screw features precise Class 2A thread fit tolerances and UNC coarse threading (20 threads per inch) for consistent performance. Manufacturing complies with Fed. Spec. FF-S-92, QQ-P-35, and MS51957-82 standards, ensuring dimensional accuracy and material quality. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and substance restriction requirements for industrial components.