S-91400A903 5/16"-18 x 1/2" FF-S-92, QQ-P-35, MS51957-94 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
- Superior corrosion resistance with passivated 18-8 stainless steel construction, 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 Phillips No. 4 drive and standard pan head design
- Precise Class 2A thread fit provides consistent engagement and reduces cross-threading risks
- Full threading along the 1/2" length offers maximum grip and uniform stress distribution
- Compliance with major industry standards including Fed. Spec. FF-S-92, QQ-P-35, and MS51957-94
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global supply chain integration
Professional Applications & Engineering Value
This 5/16"-18 UNC fully threaded screw delivers exceptional value in demanding applications where corrosion resistance and mechanical strength are critical. The passivated 18-8 stainless steel construction prevents rust and degradation in moisture-rich environments, while the coarse UNC threads and Class 2A fit ensure rapid assembly with reduced installation torque requirements. The combination of rounded pan head design and Phillips No. 4 drive provides secure fastening in machinery, electrical enclosures, and structural assemblies where vibration resistance and repeated maintenance access are essential. These industrial screws maintain dimensional stability across temperature variations, making them suitable for automotive, marine, and manufacturing equipment where fastener failure is not an option.
Specification Summary & Compliance
This fastener features 5/16"-18 UNC coarse threads with Class 2A dimensional tolerance for consistent fit. Manufacturing complies with Fed. Spec. FF-S-92, QQ-P-35, and MS51957-94 standards. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for hazardous substance restrictions.
