S-91400A539 1/4"-20 x 5/8" FF-S-92, QQ-P-35, MS51957-80 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life.
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and mechanical stress.
- Coarse UNC threading provides faster installation and superior resistance to vibration loosening.
- Class 2A thread fit guarantees consistent, precise engagement for smooth assembly and reduced cross-threading risk.
- Fully threaded design offers maximum grip and holding power along the entire fastener length.
- Phillips No. 3 drive enables efficient installation with common tools, reducing assembly time.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance for global industrial applications.
Professional Applications & Engineering Value
This 1/4"-20 x 5/8" rounded head screw delivers critical engineering value in demanding industrial settings. The passivated 18-8 stainless steel provides outstanding corrosion resistance, making it suitable for marine, chemical processing, and outdoor equipment where moisture and corrosive agents are prevalent. The coarse UNC thread and Class 2A fit ensure quick, secure fastening in materials like steel and aluminum, reducing installation errors and maintenance needs. With an 80,000 psi tensile strength and fully threaded body, it maintains structural integrity under vibration and dynamic loads, ideal for machinery assembly, automotive components, and heavy-duty enclosures. The Phillips No. 3 drive simplifies tool compatibility, streamlining production lines while meeting strict Fed. Spec. FF-S-92 standards for reliability.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy, ensuring precise thread engagement and interchangeability. It complies with Fed. Spec. FF-S-92, QQ-P-35, and MS51957-80 manufacturing specifications, guaranteeing consistent quality and performance. Environmental and safety adherence includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances for use in regulated industries.
