S-91400A537 1/4"-20 x 1/2" FF-S-92, QQ-P-35, MS51957-79 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with passivated 18-8 stainless steel, ideal for harsh industrial environments.
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration.
• Easy installation and removal with a No. 3 Phillips drive, reducing assembly time and tool wear.
• Precise Class 2A thread fit and coarse UNC threading for quick, secure fastening in various materials.
• Fully threaded design provides consistent grip along the entire length for enhanced holding power.
• Compliance with Fed. Spec. FF-S-92, QQ-P-35, and MS51957-79 guarantees quality and interchangeability.
• RoHS 3 and REACH compliant for safe use in regulated industries and global markets.

Professional Applications & Engineering Value

This 1/4"-20 x 1/2" pan head machine screw is engineered to address common industrial challenges, such as corrosion and mechanical stress. The passivated 18-8 stainless steel construction offers superior resistance to rust and chemicals, making it suitable for outdoor, marine, and chemical processing equipment. Its coarse UNC thread and Class 2A fit ensure quick assembly and reliable performance in metals and plastics, reducing the risk of cross-threading. The rounded pan head with a Phillips drive provides a low-profile, secure fastening solution for machinery, automotive assemblies, and electrical enclosures, enhancing durability and maintenance efficiency in demanding B2B applications.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A tolerance for precise fit, manufactured to Fed. Spec. FF-S-92, QQ-P-35, and MS51957-79 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.