S-91400A170 6-40 x 1/4" FF-S-92, QQ-P-35, MS51958-26, NASM51958 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional tensile strength of 80,000 PSI provides reliable, high-load fastening for demanding industrial applications.
• Precise Class 2A thread fit guarantees smooth installation and secure, vibration-resistant connections.
• Fully threaded design offers maximum grip and uniform stress distribution along the entire length.
• Fine UNF thread profile enables finer adjustments and improved holding power in precision assemblies.
• Phillips No. 2 drive ensures common tool compatibility and efficient, cam-out resistant installation.
• Compliance with major industry standards including Fed. Spec. FF-S-92, QQ-P-35, MS51958-26, and NASM51958, ensuring consistent quality and interchangeability.

Professional Applications & Engineering Value

This 6-40 UNF fine thread pan head screw is engineered to address critical challenges in precision assemblies where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel material provides excellent protection against oxidation and chemical exposure, making it ideal for electronics, aerospace, marine, and medical equipment. The fully threaded and fine thread design ensures superior clamping force and minimizes loosening under vibration, while the rounded pan head with Phillips drive offers a low-profile, secure fastening solution that withstands rigorous operational demands.

Specification Summary & Compliance

This screw features a 6-40 UNF fine thread with Class 2A tolerance for precise fit, a 1/4" length, and is manufactured in compliance with Fed. Spec. FF-S-92, QQ-P-35, MS51958-26, and NASM51958. It is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations.